2/7 (3X-7)=2-1.5x

问题描述:

2/7 (3X-7)=2-1.5x

2/7 (3X-7)=2-1.5x 两边同乘以7 2(3x-7)=7(2-1.5x) 6x-14=14-10.5x
16.5x=28 x=59/31