20=28-3x+x

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Solution for 20=28-3x+x equation: 



20=28-3x+x

We move all terms to the left:

20-(28-3x+x)=0

We add all the numbers together, and all the variables

-(-2x+28)+20=0

We get rid of parentheses

2x-28+20=0

We add all the numbers together, and all the variables

2x-8=0

We move all terms containing x to the left, all other terms to the right

2x=8

x=8/2

x=4

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