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57(x+3)=20
We move all terms to the left:
57(x+3)-(20)=0
We multiply parentheses
57x+171-20=0
We add all the numbers together, and all the variables
57x+151=0
We move all terms containing x to the left, all other terms to the right
57x=-151
x=-151/57
x=-2+37/57
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