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x/2-30=100
We move all terms to the left:
x/2-30-(100)=0
We add all the numbers together, and all the variables
x/2-130=0
We multiply all the terms by the denominator
x-130*2=0
We add all the numbers together, and all the variables
x-260=0
We move all terms containing x to the left, all other terms to the right
x=260
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