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30=y/4+2
We move all terms to the left:
30-(y/4+2)=0
We get rid of parentheses
-y/4-2+30=0
We multiply all the terms by the denominator
-y-2*4+30*4=0
We add all the numbers together, and all the variables
-1y+112=0
We move all terms containing y to the left, all other terms to the right
-y=-112
y=-112/-1
y=+112
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