Question

Tìm x 

a) 2(3x-1)-4(1+3x)=16

b) 2x(x-1)-3(x^2-4x)+x(x+2)=-3

Answer 1

a) \(\Rightarrow6x-2-4-12x=16\)

\(\Rightarrow-6x-6=16\)

\(\Rightarrow-6x=22\)

\(\Rightarrow x=\frac{-11}{3}\)

b) \(\Rightarrow2x^2-2x-3x^2+12x+x^2+2x=-3\)

\(\Rightarrow14x=-3\)

\(\Rightarrow x=\frac{-3}{14}.\)