Question

-12/13x-5=\(6\dfrac{1}{13}\)

Answer 1

\(\dfrac{-12}{13}x-5=6\dfrac{1}{13}\)

\(\Leftrightarrow\dfrac{-12}{13}x=6\dfrac{1}{13}+5\)

\(\Leftrightarrow\dfrac{-12}{13}x=\dfrac{79}{13}+\dfrac{65}{13}\)

\(\Leftrightarrow\dfrac{-12}{13}x=\dfrac{79+65}{13}\)

\(\Leftrightarrow\dfrac{-12}{13}x=\dfrac{144}{13}\)

\(\Leftrightarrow x=\dfrac{144}{13}:\dfrac{-12}{13}\)

\(\Leftrightarrow x=\dfrac{144}{13}.\dfrac{13}{-12}\)

\(\Leftrightarrow x=\dfrac{1872}{156}\)

\(\Leftrightarrow x=12\)

Vậy \(x=12\)