(x-40%x+6)/(x-1/4x-6)=12/13

问题描述:

(x-40%x+6)/(x-1/4x-6)=12/13

(0.6x+6)/(3/4x-6)=12/13
13(0.6x+6)=12(3/4x-6)
7.8x+78=9x-72
150=1.2x
x=125