解方程7x-2x+12.5=26.5
问题描述:
解方程7x-2x+12.5=26.5
答
7x-2x+12.5=26.5
5x=14
x=14/5
x=2.8
解方程7x-2x+12.5=26.5
7x-2x+12.5=26.5
5x=14
x=14/5
x=2.8