1.8(X+10)=0.8X+50 怎么解方程?3.5(X-10)=6.5(100-X)

问题描述:

1.8(X+10)=0.8X+50 怎么解方程?3.5(X-10)=6.5(100-X)
两个都要!

1.8(X+10)=0.8X+50
1.8X+18=0.8X+50
1.8X-0.8X=50-18
X=32
3.5(X-10)=6.5(100-X)
3.5X-35=650-6.5X
10X=685
X=68.5