Question

tìm x, biết : |  x + 11/17 | + | x + 2/17 | + | x + 4/17 | = 4x

Answer 1

\(x+\frac{11}{17}+x+\frac{2}{17}+x+\frac{4}{17}=4x\)

\(\Rightarrow3x+1=4x\)

\(\Rightarrow x=1\)

Answer 2

Vì vế trái >=0 => vế phải >=0 => x>=0

Khi đó ta có: \(x+\frac{11}{17}+x+\frac{2}{17}+x+\frac{4}{17}=4x\)

             =>  \(3x+1=4x\)

             => \(x=1\)