3x-(-9x)=0

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Solution for 3x-(-9x)=0 equation: 


Simplifying
3x + -1(-9x) = 0

Remove parenthesis around (-9x)
3x + -1 * -9x = 0

Multiply -1 * -9
3x + 9x = 0

Combine like terms: 3x + 9x = 12x
12x = 0

Solving
12x = 0

Solving for variable 'x'.

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

Divide each side by '12'.
x = 0

Simplifying
x = 0

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