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a/ 100 . 37 + 37. 37 + 200 . 63 - 63 . 63\
= 37 .[ 100+ 37 ] + 63 . [ 200 - 63 ]
= 37. 137 + 63 . 137
= 137. [ 37 + 63 ]
= 137 . 100 = 13700
b/ 84 + 14 .6 + 7 . 12 + 21. 4 + 3.28
= 84 + 84 + 84 + 84 +84
= 84. 5 = 420
[ dấu " ." là " x" nha ] đừng quên tích cho tui
Ta có:460+850x4=a+200/4
=>800=a+200/4
=>800x4=a+200
=>3200=a+200
=>a=3200-200=3000
ủng hộ nhak
460+85x4=(X+200):4
460+340=(X+200):4
800 =(X+200):4
X+200=800x4
X+200= 3200
X = 3200-200
X = 3000.
K nhé Nguyễn Phương Chi.
X – 60 : 15 = 20,5
=> X – 60 = 307,5
=> X = 367,5
X : 4 + 12 = 23
=> X : 4 = 11
=> X = 44
( x – 60 ) : 15 = 20
=> x – 60 = 300
=> x = 360
3 .(x + 7)- 15= 27
=> 3 .(x + 7) = 42
=> x + 7 = 14
=> x = 7
2. ( x – 5 )- 17 = 24 + 6 x 1,5
=> 2. ( x – 5 ) - 17 = 33
=> 2. ( x – 5 ) = 50
=> x - 5 = 25
=> x = 30
\(a,x-60:15=20,5\)
\(x-4=20,5\)
\(x=20,5+4=24,5\)
\(b,x:4+12=23\)
\(x:4=23-12=11\)
\(x=11.4=44\)
\(c,\)\(\left(x-60\right)\)\(:15=20\)
\(x-60=20.15=300\)
\(x=300+60=360\)
\(d,3\left(x+7\right)\)\(-15=27\)
\(3\left(x+7\right)\)\(=27+15=42\)
\(x+7=42:3=14\)
\(x=14-7=7\)
\(e,2\left(x-5\right)\)\(-17=24+6.1,5=24+9=33\)
\(2\left(x-5\right)\)\(=33+17=50\)
\(x-5=50:2=25\)
\(x=25+5=30\)
=>........................
3636 : ( 12x - 91 ) = 36
12x - 91 = 3636 :36
12x - 91 = 101
12x = 101 + 91
12x = 192
x = 192 : 12
x = 16
vậy x = 16
460 + 85 . 4 = ( x + 200 ) : 4
460 + 340 = ( x + 200 ) : 4
800 = ( x + 200 ) : 4
( x + 200 ) : 4 = 800
x + 200 = 800 . 4
x + 200 = 3200
x = 3200 - 200
x = 3000
vậy x = 3000
k mk nha bạn
thanks nhìu ^,^
\(3636:\left(12x-91\right)=36\)
\(\Rightarrow12x-91=3636:36\)
\(\Rightarrow12x-91=101\)
\(\Rightarrow12x=101+91\)
\(\Rightarrow12x=192\)
\(\Rightarrow x=16\)
\(460+85\cdot4=\left(x+200\right):4\)
\(\Rightarrow460+340=\left(x+200\right):4\)
\(\Rightarrow800=\left(x+200\right):4\)
\(\Rightarrow x+200=800\cdot4\)
\(\Rightarrow x+200=3200\)
\(\Rightarrow x=3200-200\)
\(\Rightarrow x=3000\)
sorry tui làm sai câu này!!!
2/3 +4/37 +5/111 +260 /1443
=962/1443+156/1443+65/1443+260/1443
= 962+156+65+260/1443=1
tìm x
1)1/2 - ( x+3/14) = 1/6
=> x+3/14=1/2-1/6
=> x= 1/3 - 3/14
=> x= 5/42
2)( x- 1/3 ) -5/2 = 1/7
=> x-1/3= 1/7+5/2
=> x= 37/14+1/3
=> x= 125/42
3)5/8 + ( x- 1/4 ) = 4/3
=>x-1/4=4/3-5/8
=>x= 17/24 +1/4
=> x= 23/24
4) 4/3 - ( 1/4 -x ) =1
=>1/4-x=4/3-1
=>x=1/4-1/3
=> x= -1/12
Chúc bạn Hk tốt!!!
2/3 +4/37 +5/111 +260 /1443\(=\frac{635}{629}\)
Tìm x
1. \(x=\frac{5}{42}\)
2. \(x=\frac{125}{42}\)
3. \(x=\frac{23}{24}\)
4. \(x=-\frac{1}{12}\)
Chúc bạn Hk tốt!!!
a. x - 4300 - (5250 : 1050 : 250) =4240
x - 4300 - (5 : 250) =4240
x - 4300 - 0,02 =4240
x - 4300 = 4240 + 0,02
x - 4300 =4240,02
x=4240,02+4300
x=854,02
b. 460 + 85 .4 : (x + 200) =4
a. x - 4300 - (5250 : 1050 : 250) = 4240
=> x - 4300 - 1/50 = 4240
x - 4300 = 4240 + 1/50
lk ùi ko lm nữa !! =="
93 + 7 : x = 112
7 : x = 112 - 93
7 : x = 19
x = 7 : 19
x = 7/19
84 : x - 6 = 15
84 : x = 16 + 5
84 : x = 21
x = 84 : 21
x = 4