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42=-3-5y
We move all terms to the left:
42-(-3-5y)=0
We add all the numbers together, and all the variables
-(-5y-3)+42=0
We get rid of parentheses
5y+3+42=0
We add all the numbers together, and all the variables
5y+45=0
We move all terms containing y to the left, all other terms to the right
5y=-45
y=-45/5
y=-9
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