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14+x/2=21
We move all terms to the left:
14+x/2-(21)=0
We add all the numbers together, and all the variables
x/2-7=0
We multiply all the terms by the denominator
x-7*2=0
We add all the numbers together, and all the variables
x-14=0
We move all terms containing x to the left, all other terms to the right
x=14
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