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6(3x+6)=87
We move all terms to the left:
6(3x+6)-(87)=0
We multiply parentheses
18x+36-87=0
We add all the numbers together, and all the variables
18x-51=0
We move all terms containing x to the left, all other terms to the right
18x=51
x=51/18
x=2+5/6
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