(-y)-y=3

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Solution for (-y)-y=3 equation: 



(-y)-y=3

We move all terms to the left:

(-y)-y-(3)=0

We add all the numbers together, and all the variables

(-1y)-y-3=0

We add all the numbers together, and all the variables

-1y+(-1y)-3=0

We get rid of parentheses

-1y-1y-3=0

We add all the numbers together, and all the variables

-2y-3=0

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

-2y=3

y=3/-2

y=-1+1/2

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