4x-(-9x)=

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Solution for 4x-(-9x)= equation: 


Simplifying
4x + -1(-9x) = 0

Remove parenthesis around (-9x)
4x + -1 * -9x = 0

Multiply -1 * -9
4x + 9x = 0

Combine like terms: 4x + 9x = 13x
13x = 0

Solving
13x = 0

Solving for variable 'x'.

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

Divide each side by '13'.
x = 0

Simplifying
x = 0

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