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0.5(x-3)=12
We move all terms to the left:
0.5(x-3)-(12)=0
We multiply parentheses
0.5x-1.5-12=0
We add all the numbers together, and all the variables
0.5x-13.5=0
We move all terms containing x to the left, all other terms to the right
0.5x=13.5
x=13.5/0.5
x=27
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