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42=10-2y
We move all terms to the left:
42-(10-2y)=0
We add all the numbers together, and all the variables
-(-2y+10)+42=0
We get rid of parentheses
2y-10+42=0
We add all the numbers together, and all the variables
2y+32=0
We move all terms containing y to the left, all other terms to the right
2y=-32
y=-32/2
y=-16
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