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3x-54.5=2x+3
We move all terms to the left:
3x-54.5-(2x+3)=0
We get rid of parentheses
3x-2x-3-54.5=0
We add all the numbers together, and all the variables
x-57.5=0
We move all terms containing x to the left, all other terms to the right
x=57.5
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