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(x+0,9 ) . (1-0,4)=2412
(x+0,9).0,6=2412
x+0,9=2412 : 0,6
x+0,9=4020
x=4020-0,9
x=4019,1
tick đúng nha
a) \(12,5.4-x=4,3+2,6.\)
\(\Rightarrow12,5.4-x=6,9\)
\(\Rightarrow50-x=6,9\)
\(\Rightarrow x=50-6,9=43,1\)
b) \(\left(x+0,9\right).\left(1-0,4\right)=2412\)
\(\Rightarrow\left(x+0,9\right).0,6=2412\)
\(\Rightarrow x+0,9=2412:0,6=4020\)
\(\Rightarrow x=4020-0,9=4019,1\)
Ủng hộ mik nha!
a) \(\left(2,4-3x\right).0,5=0,9\)
\(2,4-3x=0,9:0,5\)
\(2,4-3x=1,8\)
\(3x=2,4-1,8\)
\(3x=0,6\)
\(x=0,6:3\)
\(x=0,2\)
b) \(\left(8,8x-50\right):0,4=51\)
\(8,8x-50=51.0,4\)
\(8,8x-50=20,4\)
\(8,8x=20,4+50\)
\(8,8x=70,4\)
\(x=70,4:8,8\)
\(x=8\)
c) \(\left(0,472-x\right):2=1,634\)
\(0,472-x=1,634.2\)
\(0,472-x=3,268\)
\(x=0,472-3,268\)
\(x=-2,796\)
d) \(1,6-\left(x-0,2\right)=6,5\)
\(x-0,2=1,6-6,5\)
\(x-0,2=-4,9\)
\(x=-4,9+0,2\)
\(x=-4.7\)
\(a.2,4-3x=1,8\)
\(3x=0,6\)
\(x=0,2\)
\(b.8,8x-50=20,4\)
\(8,8x=70,4\)
\(x=8\)
\(c.0,472-x=3,268\)
\(x=-2,796\)
\(d.x-0,2=-4,9\)
\(x=-4,7\)
B)\(\frac{11}{2}+x=\frac{3}{2}-7\)
\(\frac{11}{2}+x=\frac{3}{2}-\frac{14}{2}\)
\(\frac{11}{2}+x=\frac{-11}{2}\)
\(x=\frac{-11}{2}-\frac{11}{2}\)
\(x=\frac{-22}{2}\)
\(x=-11\)
A)\(\frac{1}{3}x+\frac{2}{5}\left(x+1\right)=0\)
\(\frac{1}{3}x+\frac{2}{5}x+\frac{2}{5}=0\)
\(x\cdot\left(\frac{1}{3}+\frac{2}{5}\right)=0-\frac{2}{5}\)
\(x\cdot\left(\frac{5}{15}+\frac{6}{15}\right)=-\frac{2}{5}\)
\(x\cdot\frac{11}{15}=\frac{-2}{5}\)
\(x=\frac{-2}{5}:\frac{11}{5}\)
\(x=\frac{-2}{11}\)
nhớ k cho mình nha
a) 1/3 x + 0,4 ( x + 1 ) = 0
<=> 1/3 x + 0,4 . x + 0,4 . 1 = 0
<=> 1/3 x + 0,4 x + 0,4 = 0
<=> x. ( 1/3 + 0,4 ) + 0,4 = 0
<=> x. 11/15 + 0.4 = 0
<=> x. 11/15 = -2/5
<=> x = -2/5 : 11/15 = - 6/11
b) 1 1/2 + x = 3/2 -7
<=> 3/2 + x = -11/2
<=> x = -11/2 - 3/2
<=> x = -7 < GOOD LUCK >
\(\frac{0,4\cdot13,68\cdot0,9 +0,6\cdot48,24\cdot0,6+0,2\cdot38,08\cdot1,8}{5:0,125+8:0,25}\)
Tử số : 0,4 x 13,68 x 0,9 +0,6 x 48,24 x 0,6 + 0,2 x 38,08 x 1,8
= 0,36 x 13,68 + 0,36 x 48,24 + 0,36 x 38,08
= 0,36 x ( 13,68 + 48,24 + 38,08 )
= 0,36 x 100
= 36
Mẫu số : 5 : 0,125 + 8 : 0,25
= 5 x 8 + 8 x 4
= 8 x ( 5 + 4 )
= 8 x 9
= 27
Vậy : \(\frac{0,4\cdot13,38\cdot0,9+0,6\cdot48,24\cdot0,6+0,2\cdot38,08\cdot1,8}{5:0,125+8:0,25}=\frac{36}{27}=\frac{4}{3}\)