x-y+a=-1

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Solution for x-y+a=-1 equation:


Simplifying
x + -1y + a = -1

Reorder the terms:
a + x + -1y = -1

Solving
a + x + -1y = -1

Solving for variable 'a'.

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

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

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

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

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

Simplifying
a = -1 + -1x + y

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