9r-(-3r)+12r=

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Solution for 9r-(-3r)+12r= equation: 


Simplifying
9r + -1(-3r) + 12r = 0

Remove parenthesis around (-3r)
9r + -1 * -3r + 12r = 0

Multiply -1 * -3
9r + 3r + 12r = 0

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

Combine like terms: 12r + 12r = 24r
24r = 0

Solving
24r = 0

Solving for variable 'r'.

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

Divide each side by '24'.
r = 0

Simplifying
r = 0

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