Question

Tìm nghiệm của 2(-x+5)-3/2(x-4)

Answer 1

\(2.\left(-x+5\right)-\dfrac{3}{2}.\left(x-4\right)=0\)

<=> \(-2x+10-\dfrac{3x}{2}+6=0\)

<=> \(\dfrac{-7x}{2}+16=0\)

<=> \(\dfrac{-7x}{2}=-16\)

<=> \(x=\dfrac{32}{7}\)

vậy ...

Answer 2

Ta có: \(2\left(-x+5\right)-\dfrac{3}{2}\left(x-4\right)=0\)

\(\Leftrightarrow-2x-10-\dfrac{3}{2}x+6=0\)

\(\Leftrightarrow x\cdot\dfrac{-7}{2}=4\)

hay \(x=-\dfrac{8}{7}\)