r-18=12

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Solution for r-18=12 equation: 


Simplifying
r + -18 = 12

Reorder the terms:
-18 + r = 12

Solving
-18 + r = 12

Solving for variable 'r'.

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

Add '18' to each side of the equation.
-18 + 18 + r = 12 + 18

Combine like terms: -18 + 18 = 0
0 + r = 12 + 18
r = 12 + 18

Combine like terms: 12 + 18 = 30
r = 30

Simplifying
r = 30

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