12+r=54

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Solution for 12+r=54 equation: 


Simplifying
12 + r = 54

Solving
12 + r = 54

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + r = 54 + -12

Combine like terms: 12 + -12 = 0
0 + r = 54 + -12
r = 54 + -12

Combine like terms: 54 + -12 = 42
r = 42

Simplifying
r = 42

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