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199=63-y
We move all terms to the left:
199-(63-y)=0
We add all the numbers together, and all the variables
-(-1y+63)+199=0
We get rid of parentheses
1y-63+199=0
We add all the numbers together, and all the variables
y+136=0
We move all terms containing y to the left, all other terms to the right
y=-136
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