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x/3-100=315
We move all terms to the left:
x/3-100-(315)=0
We add all the numbers together, and all the variables
x/3-415=0
We multiply all the terms by the denominator
x-415*3=0
We add all the numbers together, and all the variables
x-1245=0
We move all terms containing x to the left, all other terms to the right
x=1245
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