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2+y/2=4
We move all terms to the left:
2+y/2-(4)=0
We add all the numbers together, and all the variables
y/2-2=0
We multiply all the terms by the denominator
y-2*2=0
We add all the numbers together, and all the variables
y-4=0
We move all terms containing y to the left, all other terms to the right
y=4
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