x-0.5x=16 5(x+2.5)=30用方程解。

2025-06-21 02:16:52
推荐回答(5个)
回答1:

x-0.5x=16 0.5x=16
x=32

5(x+2.5)=30
5x+12.5=30 5x=17.5 x=3.5

回答2:

x-0.5x=16
0.5x=16
x=32

5x+12.5=30
5x=17.5
x=3.5

回答3:

x-0.5x=16
0.5x=16

x=8;
5(x+2.5)=30
5x+2.5*5=30
5x=17.5
x=3.5

回答4:

0.5x=16
x=32

5x+12.5=30
5x=17.5
x=3.5

回答5:

x=32
x=3.5