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\(60\%x+0,4x+x:3=2\\ \Leftrightarrow\left(60\%+0,4+\dfrac{1}{3}\right)x=2\\ \Rightarrow\dfrac{4}{3}x=2\\ \Rightarrow x=\dfrac{3}{2}\)
\(60\%x+0,4x+x:3=2\)
\(x.\left(60\%+0,4+\dfrac{1}{3}\right)=2\)
\(x.\dfrac{4}{3}=2\)
\(x=2:\dfrac{4}{3}\)
\(x=\dfrac{3}{2}\)
a) \(1\frac{2}{7} = 1 + \frac{2}{7} = \frac{9}{2}\)
\(\begin{array}{l}x:1\frac{2}{7} = - 3,5\\x:\frac{9}{7} = - \frac{7}{2}\\x = - \frac{7}{2}.\frac{9}{7}\\x = - \frac{9}{2}\end{array}\)
b) \(0,4.x - \frac{1}{5}.x = \frac{3}{4}\)
\(\begin{array}{l}\frac{2}{5}.x - \frac{1}{5}.x = \frac{3}{4}\\\left( {\frac{2}{5} - \frac{1}{5}} \right).x = \frac{3}{4}\\\frac{1}{5}.x = \frac{3}{4}\\x = \frac{3}{4}:\frac{1}{5}\\x = \frac{3}{4}.5\\x = \frac{{15}}{4}\end{array}\)
`Answer:`
Vì đề bài khá khó nhìn nên mình làm thành hai bài nhé. Đề nào đúng thì bạn tham khảo.
`x : (9 1/2 - 3/2 ) = 0,4 + 2/9 - 2/11 . 1/6 + 8/9 - 8/11`
`=> x : ( 19/2 - 3/2 ) = 28/45 - 1/33 + 8/9 - 8/11`
`=> x : 8 = 293/495 + 8/9 - 8/11`
`=> x : 8 = 733/495 - 8/11`
`=> x : 8 = 373/495`
`=> x = 373/495 .8`
`=> x = 2984/495`
`x : ( 9 1/2 - 3/2 ) = (0,4 + 2/9 - 2/11 )/(1,6 + 8/9 - 8/11 )`
`=> x : (19/2 - 3/2 ) = (2 . (1/5 + 1/9 - 1/11))/(8.(1/5 + 1/9 - 1/11))`
`=> x : 8 = 2/8`
`=> x = 2/8 .8`
`=> x = 2`
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 >
\(x:\left(9+\frac{1}{2}-\frac{3}{2}\right)=\frac{2\left(\frac{1}{5}+\frac{1}{9}+\frac{1}{11}\right)}{8\left(\frac{1}{5}+\frac{1}{9}+\frac{1}{11}\right)}\)
\(x:8=\frac{1}{4}\)
x=2
a) \(x=-\dfrac{3}{5}\times\dfrac{9}{7}=-\dfrac{27}{35}\)
b) \(x\left(0,4-\dfrac{1}{5}\right)=\dfrac{3}{4}\)
\(x=\dfrac{3}{4}:\dfrac{1}{5}=\dfrac{15}{4}\)
a, \(x=-3,5.\dfrac{9}{7}=-\dfrac{9}{2}\)
b, \(\dfrac{2}{5}x-\dfrac{1}{5}x=\dfrac{3}{4}\Leftrightarrow\dfrac{1}{5}x=\dfrac{3}{4}\Leftrightarrow x=\dfrac{3}{4}:\dfrac{1}{5}=\dfrac{15}{4}\)
60%+x+0,4+x+x:3=2
3/5+x+2/5+x+x.1/3=2
(3/5+2/5)+x.(1+1+1/3)=2
1+x.10/3=2
suy ra x.10/3=1
x=1:10/3
x=3/10
vậy x=3/10 nha