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20=2(x-8)+2x
We move all terms to the left:
20-(2(x-8)+2x)=0
We calculate terms in parentheses: -(2(x-8)+2x), so:We get rid of parentheses
2(x-8)+2x
We add all the numbers together, and all the variables
2x+2(x-8)
We multiply parentheses
2x+2x-16
We add all the numbers together, and all the variables
4x-16
Back to the equation:
-(4x-16)
-4x+16+20=0
We add all the numbers together, and all the variables
-4x+36=0
We move all terms containing x to the left, all other terms to the right
-4x=-36
x=-36/-4
x=+9
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