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9(2x-7)=-99
We move all terms to the left:
9(2x-7)-(-99)=0
We add all the numbers together, and all the variables
9(2x-7)+99=0
We multiply parentheses
18x-63+99=0
We add all the numbers together, and all the variables
18x+36=0
We move all terms containing x to the left, all other terms to the right
18x=-36
x=-36/18
x=-2
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