2x加50%x=7?

2025-12-14 22:05:57
推荐回答(2个)
回答1:

2X+1/2X=7
4/2X+1/2X=7
5/2X=7
X=7*2/5
X=14/5
X=2.8

回答2:

2x+0.5x=7
2.5x=7
x=14/5
x=2.8