解方程 (1)8x-16=0 (2)2.4x+1.2×2=7.2 (3)12.5x-6x=19.5

问题描述:

解方程 (1)8x-16=0 (2)2.4x+1.2×2=7.2 (3)12.5x-6x=19.5

(1)8x-16=0
8x =16
x=2
(2)2.4x+1.2×2=7.2
2.4x+2.4=7.2
2.4x=4.8
x=2
(3)12.5x-6x=19.5
6.5x = 19.5
x = 3