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7(x+1)=3x+57
We move all terms to the left:
7(x+1)-(3x+57)=0
We multiply parentheses
7x-(3x+57)+7=0
We get rid of parentheses
7x-3x-57+7=0
We add all the numbers together, and all the variables
4x-50=0
We move all terms containing x to the left, all other terms to the right
4x=50
x=50/4
x=12+1/2
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