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2(2x)+2(x)=x+84
We move all terms to the left:
2(2x)+2(x)-(x+84)=0
We add all the numbers together, and all the variables
24x-(x+84)=0
We get rid of parentheses
24x-x-84=0
We add all the numbers together, and all the variables
23x-84=0
We move all terms containing x to the left, all other terms to the right
23x=84
x=84/23
x=3+15/23
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