4×0.5+2x=20 解方程,

问题描述:

4×0.5+2x=20 解方程,

原式=2+2x=20
2x=20-2
2x=18
x=9

2+2x=20
2x=20-2
2x=18
x=18÷2
x=9

4×0.5+2x=20
2+2x=20
2x=20-2
2x=18
x=9

x=9

2+2x=20
2+2x-2=20-2
2x=18
2x÷2=18÷2
x=9