-x+a=-b

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Solution for -x+a=-b equation: 


Simplifying
-1x + a = -1b

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

Solving
a + -1x = -1b

Solving for variable 'a'.

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

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

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

Simplifying
a = -1b + x

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