Question

方程过程 [0.85x-（x-45）]*8=[（x-35）-（x-45）]*12

Answer 1

[0.85x-（x-45）]*8=[（x-35）-（x-45）]*12

(0.85x-x+45)*8=(x-35-x+45)*12

6.8x-8x+360=120

360-120=8x-6.8x

240=1.2x

x=240/1.2

x=200