Tìm x, biết 4(18−5x) −12(3x−7) = 15(2x−16) −(6x+14)

* Hướng dẫn giải

$$\begin{gathered} 4\left(18-5x\right)-12\left(3x-7\right)=15\left(2x-16\right)-6\left(x+14\right) \\ 72-20x-36x+84=30x-240-6x-84 \\ 156-56x=24x-324 \\ 156+324=24x+56x \\ 80x=480 \\ x=6 \end{gathered}$$