1=-1+y

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Solution for 1=-1+y equation: 



1=-1+y

We move all terms to the left:

1-(-1+y)=0

We add all the numbers together, and all the variables

-(y-1)+1=0

We get rid of parentheses

-y+1+1=0

We add all the numbers together, and all the variables

-1y+2=0

We move all terms containing y to the left, all other terms to the right

-y=-2

y=-2/-1

y=+2

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