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6(x+7)2=30
We move all terms to the left:
6(x+7)2-(30)=0
We multiply parentheses
12x+84-30=0
We add all the numbers together, and all the variables
12x+54=0
We move all terms containing x to the left, all other terms to the right
12x=-54
x=-54/12
x=-4+1/2
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