解方程:(1)6*0.5+8X=39 (2) 9*8-4X=60 (3) 7X-X=124.8 )

问题描述:

解方程:(1)6*0.5+8X=39 (2) 9*8-4X=60 (3) 7X-X=124.8 )

(1)6*0.5+8X=39
3+8x=39
8x=36
x=4.5

(2) 9*8-4X=60
72-4x=60
4x=12
x=3

(3) 7X-X=124.8
6x=124.8
x=124.8÷6
x=20.8

(1)6*0.5+8X=39
3+8x=39
8x=39-3
8x=36
x=4.5

(2) 9*8-4X=60
72-4x=60
4x=72-60
4x=12
x=3

(3) 7X-X=124.8
6x=124.8
x=124.8÷6
x=20.8

(1)6*0.5+8X=39
3+8x=39
8x=39-3
8x=36
x=4.5
(2) 9*8-4X=60
72-4x=60
4x=72-60
4x=12
x=3
(3) 7X-X=124.8
7x-1x=124.8
(7-1)x=124.8
6x=124.8
x=20.8