20-2.5x=12.8 x等于多少
问题描述：
20-2.5x=12.8 x等于多少
答
2.5x=8，x=16/5。8x=128/5
答
20 - 2.5 x = 12.8
- 2.5 x = 12.8 - 20
- 2.5 x = - 7.2 (两边去负号）
2.5 x = 7.2
x = 7.2/2.5
x = 2.88
=> x = 2.88
答
2.5x=20-12.8
x=7.2除于2.5
x=2.88
答
20-2.5x=12.8,
2.5x=20-12.8,
x=7.2/2.5=2.88.
答
20-2.5x=12.8
20-12.8=2.5x
2.5x=7.2
x=7.2/2.5=2.88
x=2.88
答
15.3x=20
x=200/153