(5x-12)/(x+12)=7/5

问题描述:

(5x-12)/(x+12)=7/5
这个方程怎么解?求指教!

(5x-12)/(x+12)=7/5 可得:
5(5x-12)=7(x+12)
25x-60=7x+84
25x-7x=84+60
18x=144
x=8