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LH
3
30 tháng 5 2020
\(\frac{379-x}{12}=21,7\) Đ/S : 118,6
ND
0
NH
1
JJ
12 tháng 5 2018
\(\frac{22}{5}\)\(:\)\(x\)\(=\)\(\frac{44}{5}\)\(:\)\(\frac{5}{2}\)
\(\frac{22}{5}\)\(:\)\(x\)\(=\)\(\frac{88}{25}\)
\(x\)\(=\)\(\frac{22}{5}\)\(:\)\(\frac{88}{25}\)
\(x\)\(=\)\(\frac{5}{4}\)
7 tháng 2 2016
câu 1:
x:4=10.8-7.2
x:4=3.6
x=3.6x4=14.4
câu 2:
X x 4=10.8+7.2
X x 4=18
X =18:4
X=4.5
5 tháng 4 2020
35,6 + (x . 4) = 100
x . 4 = 100 - 35,6
x . 4 = 64,4
x = 64,4 : 4
x =16.1
Vây x =16,1
-Tk nha-
C
18 tháng 5 2022
\(3 × 32 , 85 + 32 , 85 × a × ( a × 1 − a : 1 ) + 32 , 85 × 8 − 32 , 85 × 10\)
\(= 3 × 32 , 85 + 32 , 85 × a × ( a − a ) + 32 , 85 × 8 − 32 , 85 × 10\)
\(= 3 × 32 , 85 + 32 , 85 × a × 0 + 32 , 85 × 8 − 32 , 85 × 10\)
\(= 32 , 85 × ( 3 + a × 0 + 8 − 10 )\)
\(= 32 , 85 × ( 3 + 0 + 8 − 10 )\)
\(= 32 , 85 × 1=32,85\)
`#Ya`
19 tháng 2 2019
Ui bài khó quá mk ko làm đc xl nhé.....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................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19 tháng 2 2019
X:0,1+X:0,25+X:0,5+X×4
⇒ x :0,1+ x :0,25+ X:0,5+x:0,25=2018
⇒ X:(0,1+0,25+0,5+0,25)=2018
⇒ X:1,1=2018
⇒ x=2018 x1,1=2219,8
Vậy X=2219,8
B
2
29 tháng 12 2019
a) \(x\times4+\frac{1}{2}\times x=55,35\)
\(x\times\left(4+\frac{1}{2}\right)=55,35\)
\(x\times4,5=55,35\)
\(x=55,35:4,5=12,3\)
b) \(x-20\%\times x=216\)
\(x-0,2\times x=216\)
\(x\times\left(1-0,2\right)=216\)
\(x\times0,8=216\)
\(x=216:0,8=270\)
28 tháng 4 2016
X : 0,25 + X:0,5-Xx4 =50,28
X x 4 + X x 2 - X x 4 = 50,28
X x 6 - X x 4 = 50,28
X x 2 = 50,28
X = 50,28 : 2 = 25,14
**** mik nha m.n !!!!
\(4x+\frac{x}{2}=32,85\)
\(4x+\frac{1}{2}x=32,85\)
\(x\left(4+\frac{1}{2}\right)=32,85\)
\(\frac{9}{2}x=32,85\)
\(x=32,85:\frac{9}{2}\)
\(x=7,3\)
HT