-3x-9x=84

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Solution for -3x-9x=84 equation: 


Simplifying
-3x + -9x = 84

Combine like terms: -3x + -9x = -12x
-12x = 84

Solving
-12x = 84

Solving for variable 'x'.

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

Divide each side by '-12'.
x = -7

Simplifying
x = -7

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