-x-y=18

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Solution for -x-y=18 equation: 


Simplifying
-1x + -1y = 18

Solving
-1x + -1y = 18

Solving for variable 'x'.

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

Add 'y' to each side of the equation.
-1x + -1y + y = 18 + y

Combine like terms: -1y + y = 0
-1x + 0 = 18 + y
-1x = 18 + y

Divide each side by '-1'.
x = -18 + -1y

Simplifying
x = -18 + -1y

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