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12(5x-4.5)=66
We move all terms to the left:
12(5x-4.5)-(66)=0
We multiply parentheses
60x-54-66=0
We add all the numbers together, and all the variables
60x-120=0
We move all terms containing x to the left, all other terms to the right
60x=120
x=120/60
x=2
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