6x+150%x=9 18-20%x=8 x-25%=0.8

问题描述:

6x+150%x=9 18-20%x=8 x-25%=0.8

6x+1.5x=9
7.5x=9
x=9/7.5
X=1.2
18-0.2X=8
0.2X=18-8
X=10/0.2
X=50
X-0.25=0.8
X=0.8+0.25
X=1.05