Question

Tính

Answer 1

\(< =>\dfrac{-6}{5}+1+x=4x-2< =>-\dfrac{6}{5}+1+3=3x< =>3x=\dfrac{14}{5}< =>x=\dfrac{14}{5}.\dfrac{1}{3}=\dfrac{14}{15}\)

Answer 2

\(-\dfrac{3}{2}.\left(\dfrac{4.3-2.5}{15}\right)+x=4x-\dfrac{4}{2}\\ -\dfrac{3}{2}\left(\dfrac{2}{15}\right)+x-4x+2=0\\ \dfrac{-3.2}{2.15}-3x+2=0\\ -3x+\left(-\dfrac{1}{5}\right)+2=0\\ -3x+\dfrac{-1+2.5}{5}=0\\ -3x+\dfrac{9}{5}=0\\ -3x=-\dfrac{9}{5}\\ x=\left(-\dfrac{9}{5}\right):\left(-3\right)\\ x=\dfrac{3}{5}\)

Answer 3

\(-\dfrac{3}{2}\left(\dfrac{4}{5}-\dfrac{2}{3}\right)+x=4\left(x-\dfrac{1}{2}\right) \\\)
\(-\dfrac{6}{5}+1+x=4x-2\\\)
\(-\dfrac{1}{5}+x=4x-2\)
\(-\dfrac{1}{5}+2=4x-x\)
\(\dfrac{9}{5}=3x\)
\(\dfrac{9}{5}:3=x\)
\(\Rightarrow x=\dfrac{3}{5}\)