(8x+2.4)×2=12.8这个方程怎么解

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(8x+2.4)×2=12.8这个方程怎么解
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(8x+2.4)×2=12.8这个方程怎么解
(8x+2.4)×2=12.8这个方程怎么解

(8x+2.4)×2=12.8这个方程怎么解
(8x+2.4)×2=12.8
8x+2.4=12.8/2
8x+2.4=6.4
8x=6.4-2.4
8x=4
x=4/8
x=0.5

先12.8/2=6.4,(8x+2.4)=6.4,再8X=4,X=2

(8x+2.4)×2=12.8 -> 8x+2.4=12.8/2=6.4 -> 8x = 6.4 -2.4 =4 -> x = 4/8 =0.5

先移项,12.8除以2等于6.4,8x+2.4=6.4,8x=4,x=1/2