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4(3x-99)=-288
We move all terms to the left:
4(3x-99)-(-288)=0
We add all the numbers together, and all the variables
4(3x-99)+288=0
We multiply parentheses
12x-396+288=0
We add all the numbers together, and all the variables
12x-108=0
We move all terms containing x to the left, all other terms to the right
12x=108
x=108/12
x=9
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