-1=2-y

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Solution for -1=2-y equation: 


Simplifying
-1 = 2 + -1y

Solving
-1 = 2 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
-1 + y = 2 + -1y + y

Combine like terms: -1y + y = 0
-1 + y = 2 + 0
-1 + y = 2

Add '1' to each side of the equation.
-1 + 1 + y = 2 + 1

Combine like terms: -1 + 1 = 0
0 + y = 2 + 1
y = 2 + 1

Combine like terms: 2 + 1 = 3
y = 3

Simplifying
y = 3

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