20=3x+x+12

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Solution for 20=3x+x+12 equation: 



20=3x+x+12

We move all terms to the left:

20-(3x+x+12)=0

We add all the numbers together, and all the variables

-(4x+12)+20=0

We get rid of parentheses

-4x-12+20=0

We add all the numbers together, and all the variables

-4x+8=0

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

-4x=-8

x=-8/-4

x=+2

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