-x-3y=18

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Solution for -x-3y=18 equation: 


Simplifying
-1x + -3y = 18

Solving
-1x + -3y = 18

Solving for variable 'x'.

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

Add '3y' to each side of the equation.
-1x + -3y + 3y = 18 + 3y

Combine like terms: -3y + 3y = 0
-1x + 0 = 18 + 3y
-1x = 18 + 3y

Divide each side by '-1'.
x = -18 + -3y

Simplifying
x = -18 + -3y

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