4×0.5+2x=20 解方程,
问题描述:
4×0.5+2x=20 解方程,
答
2+2x=20
2+2x-2=20-2
2x=18
2x÷2=18÷2
x=9
4×0.5+2x=20 解方程,
2+2x=20
2+2x-2=20-2
2x=18
2x÷2=18÷2
x=9