8*25-2x=13.6 7x-2x*18=27

问题描述:

8*25-2x=13.6 7x-2x*18=27

8*25-2x=12.6
2x=12.6-8*25
2x=4.6*2.5
x=115

2x=200-13.6
2x=186.4
x=93.2
7x-2x=27+36
5x=63
x=12.6