0.9*8-3/2x=5 15x-8=4.2x

问题描述:

0.9*8-3/2x=5 15x-8=4.2x

0.9*8-3/2x=5
7.2-3/2x=5
3/2x=7.2-5
3/2x=2.2
x=2.2/(3/2)
x=22/15
15x-8=4.2x
15x-4.2x=8
10.8x=8
x=8/10.8
x=20/27