a) \(6x-35+5x-21=17x-20\)
\(\Rightarrow6x-25+5x-21+20=17x\)
\(\left(6x+5x\right)+\left(20-25-21\right)=17x\)
\(11x+\left(-36\right)=17x\)
\(17x-11x=-36\)
\(6x=-36\)
\(x=\frac{-36}{6}=-6\)
Vậy \(x=-6\)
b) \(5x+35-4x-27=14x+34\)
\(\Rightarrow5x+35-4x-27-34=14x\)
\(\left(5x-4x\right)+\left(35-27-34\right)=14x\)
\(x+\left(-26\right)=14x\)
\(14x-x=-26\)
\(13x=-26\)
\(x=-\frac{26}{13}=-2\)
Vậy \(x=-2\)
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