-3x-9x=-72

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Solution for -3x-9x=-72 equation: 


Simplifying
-3x + -9x = -72

Combine like terms: -3x + -9x = -12x
-12x = -72

Solving
-12x = -72

Solving for variable 'x'.

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

Divide each side by '-12'.
x = 6

Simplifying
x = 6

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