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82=4y+9
We move all terms to the left:
82-(4y+9)=0
We get rid of parentheses
-4y-9+82=0
We add all the numbers together, and all the variables
-4y+73=0
We move all terms containing y to the left, all other terms to the right
-4y=-73
y=-73/-4
y=18+1/4
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