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28=4y-9
We move all terms to the left:
28-(4y-9)=0
We get rid of parentheses
-4y+9+28=0
We add all the numbers together, and all the variables
-4y+37=0
We move all terms containing y to the left, all other terms to the right
-4y=-37
y=-37/-4
y=9+1/4
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