15=3r

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Solution for 15=3r equation:


Simplifying
15 = 3r

Solving
15 = 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.
15 + -3r = 3r + -3r

Combine like terms: 3r + -3r = 0
15 + -3r = 0

Add '-15' to each side of the equation.
15 + -15 + -3r = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -3r = 0 + -15
-3r = 0 + -15

Combine like terms: 0 + -15 = -15
-3r = -15

Divide each side by '-3'.
r = 5

Simplifying
r = 5

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