9x+3x=-15

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Solution for 9x+3x=-15 equation: 


Simplifying
9x + 3x = -15

Combine like terms: 9x + 3x = 12x
12x = -15

Solving
12x = -15

Solving for variable 'x'.

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

Divide each side by '12'.
x = -1.25

Simplifying
x = -1.25

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