r-15=3x

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Solution for r-15=3x equation: 


Simplifying
r + -15 = 3x

Reorder the terms:
-15 + r = 3x

Solving
-15 + r = 3x

Solving for variable 'r'.

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

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

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

Simplifying
r = 15 + 3x

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