0=-3x-9

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Solution for 0=-3x-9 equation: 


Simplifying
0 = -3x + -9

Reorder the terms:
0 = -9 + -3x

Solving
0 = -9 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
0 + 3x = -9 + -3x + 3x
Remove the zero:
3x = -9 + -3x + 3x

Combine like terms: -3x + 3x = 0
3x = -9 + 0
3x = -9

Divide each side by '3'.
x = -3

Simplifying
x = -3

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