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60+21.5x=124.5
We move all terms to the left:
60+21.5x-(124.5)=0
We add all the numbers together, and all the variables
21.5x-64.5=0
We move all terms containing x to the left, all other terms to the right
21.5x=64.5
x=64.5/21.5
x=3
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