-x=a+b

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Solution for -x=a+b equation: 


Simplifying
-1x = a + b

Solving
-1x = a + b

Solving for variable 'x'.

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

Divide each side by '-1'.
x = -1a + -1b

Simplifying
x = -1a + -1b

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