9x-3(-3x)=15

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Solution for 9x-3(-3x)=15 equation: 


Simplifying
9x + -3(-3x) = 15

Remove parenthesis around (-3x)
9x + -3 * -3x = 15

Multiply -3 * -3
9x + 9x = 15

Combine like terms: 9x + 9x = 18x
18x = 15

Solving
18x = 15

Solving for variable 'x'.

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

Divide each side by '18'.
x = 0.8333333333

Simplifying
x = 0.8333333333

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