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109=4y-9
We move all terms to the left:
109-(4y-9)=0
We get rid of parentheses
-4y+9+109=0
We add all the numbers together, and all the variables
-4y+118=0
We move all terms containing y to the left, all other terms to the right
-4y=-118
y=-118/-4
y=29+1/2
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