(8-x)×2+4x=20用方程解

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(8-x)×2+4x=20用方程解(8-x)×2+4x=20用方程解(8-x)×2+4x=20用方程解(8-x)×2+4x=2016-2x+4x=202x=20-162x=4x=4/2x=2(8-x)

(8-x)×2+4x=20用方程解
(8-x)×2+4x=20用方程解

(8-x)×2+4x=20用方程解
(8-x)×2+4x=20
16-2x+4x=20
2x=20-16
2x=4
x=4/2
x=2

(8-x)×2+4x=20
8*2-x*2+4x=20
16-2x+4x=20
16+2x=20
2x=20-16=4
x=2

(8-x)×2+4x=20
8*2-2x+4x=20
4x-2x=20-16
2x=4
x=2

(8-x)×2+4x=20
16-2x+4x=20
2x=4
x=2

(8-x)×2+4x=20
16-2x+4x=20
2x=4
x=2

(8-x)×2+4x=20
16-2x+4x=20
2x=20-16
2x=4
x=4/2
x=2