-1+(-1)y=1

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Solution for -1+(-1)y=1 equation: 


Simplifying
-1 + (-1) * y = 1

Solving
-1 + -1y = 1

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '1' to each side of the equation.
-1 + 1 + -1y = 1 + 1

Combine like terms: -1 + 1 = 0
0 + -1y = 1 + 1
-1y = 1 + 1

Combine like terms: 1 + 1 = 2
-1y = 2

Divide each side by '-1'.
y = -2

Simplifying
y = -2

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