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7(x-4)+2x-3x=20+2x
We move all terms to the left:
7(x-4)+2x-3x-(20+2x)=0
We add all the numbers together, and all the variables
7(x-4)+2x-3x-(2x+20)=0
We add all the numbers together, and all the variables
-1x+7(x-4)-(2x+20)=0
We multiply parentheses
-1x+7x-(2x+20)-28=0
We get rid of parentheses
-1x+7x-2x-20-28=0
We add all the numbers together, and all the variables
4x-48=0
We move all terms containing x to the left, all other terms to the right
4x=48
x=48/4
x=12
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