-18x-9y=72

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Solution for -18x-9y=72 equation: 


Simplifying
-18x + -9y = 72

Solving
-18x + -9y = 72

Solving for variable 'x'.

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

Add '9y' to each side of the equation.
-18x + -9y + 9y = 72 + 9y

Combine like terms: -9y + 9y = 0
-18x + 0 = 72 + 9y
-18x = 72 + 9y

Divide each side by '-18'.
x = -4 + -0.5y

Simplifying
x = -4 + -0.5y

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