2乘以(X+12.5)=34

问题描述:

2乘以(X+12.5)=34

2(x+12.5)=34
2x+25=34
2x=9
x=4.5

2乘以(X+12.5)=34
2x+25=34
2x=34-25
2x=9
x=4.5