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0.50(x-12)=3
We move all terms to the left:
0.50(x-12)-(3)=0
We multiply parentheses
0.5x-6-3=0
We add all the numbers together, and all the variables
0.5x-9=0
We move all terms containing x to the left, all other terms to the right
0.5x=9
x=9/0.5
x=18
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