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x/3=15+3
We move all terms to the left:
x/3-(15+3)=0
We add all the numbers together, and all the variables
x/3-18=0
We multiply all the terms by the denominator
x-18*3=0
We add all the numbers together, and all the variables
x-54=0
We move all terms containing x to the left, all other terms to the right
x=54
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