x+20=5x 5x+3=5.5x方程怎么列
问题描述:
x+20=5x 5x+3=5.5x方程怎么列
答
x+20=5x
5x-x=20
4x=20
x=5
5x+3=5.5x
5.5x-5x=3
0.5x=3
x=6