R+21=21+18r

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Solution for R+21=21+18r equation: 


Simplifying
R + 21 = 21 + 18r

Reorder the terms:
21 + R = 21 + 18r

Add '-21' to each side of the equation.
21 + -21 + R = 21 + -21 + 18r

Combine like terms: 21 + -21 = 0
0 + R = 21 + -21 + 18r
R = 21 + -21 + 18r

Combine like terms: 21 + -21 = 0
R = 0 + 18r
R = 18r

Solving
R = 18r

Solving for variable 'R'.

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

Simplifying
R = 18r

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