-84+15r=3r

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Solution for -84+15r=3r equation:


Simplifying
-84 + 15r = 3r

Solving
-84 + 15r = 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
-84 + 15r + -3r = 3r + -3r

Combine like terms: 15r + -3r = 12r
-84 + 12r = 3r + -3r

Combine like terms: 3r + -3r = 0
-84 + 12r = 0

Add '84' to each side of the equation.
-84 + 84 + 12r = 0 + 84

Combine like terms: -84 + 84 = 0
0 + 12r = 0 + 84
12r = 0 + 84

Combine like terms: 0 + 84 = 84
12r = 84

Divide each side by '12'.
r = 7

Simplifying
r = 7

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