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6(x-3)+3=57
We move all terms to the left:
6(x-3)+3-(57)=0
We add all the numbers together, and all the variables
6(x-3)-54=0
We multiply parentheses
6x-18-54=0
We add all the numbers together, and all the variables
6x-72=0
We move all terms containing x to the left, all other terms to the right
6x=72
x=72/6
x=12
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