Question

\(\dfrac{4.x-7}{5.x+3}=\dfrac{-2}{3}\)

giúp mình nhé

Answer 1

\(\dfrac{4x-7}{5x+3}=\dfrac{-2}{3}\)

\(\Rightarrow3\left(4x-7\right)=-2\left(5x+3\right)\)

\(\Rightarrow12x-21=-10x-6\)

\(\Rightarrow12x+10x=21-6\)

\(\Rightarrow22x=15\)

\(\Rightarrow x=\dfrac{15}{22}\)

Answer 2

\(\dfrac{4x-7}{5x+3}=\dfrac{-2}{3}\)

\(\Rightarrow3\left(4x-7\right)=-2\left(5x+3\right)\)

\(\Rightarrow12x-21=-10x-6\)

\(\Rightarrow12x-21+6=-10x\)

\(\Rightarrow12x+15=-10x\)

\(\Rightarrow-10x-12x=15\)

\(\Rightarrow-22x=15\)

\(\Rightarrow x=\dfrac{15}{-22}\)