\(-12\left(x-5\right)+7\left(3-x\right)=5\)
\(\Leftrightarrow-12x-\left(-60\right)+21-7x=5\)
\(\Leftrightarrow-12x+60+21-7x=5\)
\(\Rightarrow\left(-12x-7x\right)+\left(60+21\right)=5\)
\(\Rightarrow-19x+81=5\)
\(\Rightarrow-19x=5-81\)
\(\Rightarrow-19x=-76\)
\(\Rightarrow x=-76:\left(-19\right)\)
\(\Rightarrow x=4\)
Vậy x=4
\(-12\left(x-5\right)+7\left(3-x\right)=5\)
\(-12x+60+21-7x=5\)
\(-12x-7x=5-60-21\)
\(-19x=-76\)
\(x=4\)