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7(3x+6)/3=-7
We move all terms to the left:
7(3x+6)/3-(-7)=0
We add all the numbers together, and all the variables
7(3x+6)/3+7=0
We multiply all the terms by the denominator
7(3x+6)+7*3=0
We add all the numbers together, and all the variables
7(3x+6)+21=0
We multiply parentheses
21x+42+21=0
We add all the numbers together, and all the variables
21x+63=0
We move all terms containing x to the left, all other terms to the right
21x=-63
x=-63/21
x=-3
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