Question

Tìm \(x\in Q\) biết:

\(\left|3x+2\right|+\left|x+\frac{3}{5}\right|+\left|\frac{1}{2}-x\right|=4x\)

Answer 1

Vì \(\left|3x+2\right|+\left|x+\frac{3}{5}\right|+\left|\frac{1}{2}-x\right|>0\)

=> 4x >  0

=> x > 0

\(\Rightarrow\left(3x+2\right)+\left(x+\frac{3}{5}\right)+\left(\frac{1}{2}-x\right)=4x\)

\(\Rightarrow\left(3x-x+x\right)+\left(2+\frac{3}{5}-\frac{1}{2}\right)=4x\)

\(\Rightarrow3x+\frac{21}{10}=4x\)

=> x = - 21 / 10

Vậy  x = - 21 / 10

Answer 2

=>x vô nghiệm nhé (do thg kia thiếu phần cuối)