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3(1.5x+9)=9
We move all terms to the left:
3(1.5x+9)-(9)=0
We multiply parentheses
3x+27-9=0
We add all the numbers together, and all the variables
3x+18=0
We move all terms containing x to the left, all other terms to the right
3x=-18
x=-18/3
x=-6
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