5X-20=(4X+20)/2
问题描述:
5X-20=(4X+20)/2
答
5X-20=(4X+20)/2
10x-40=4x+20
6x=60
x=10
5X-20=(4X+20)/2
5X-20=(4X+20)/2
10x-40=4x+20
6x=60
x=10