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8+y=-y-8
We move all terms to the left:
8+y-(-y-8)=0
We add all the numbers together, and all the variables
y-(-1y-8)+8=0
We get rid of parentheses
y+1y+8+8=0
We add all the numbers together, and all the variables
2y+16=0
We move all terms containing y to the left, all other terms to the right
2y=-16
y=-16/2
y=-8
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