45+r=12

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Solution for 45+r=12 equation: 


Simplifying
45 + r = 12

Solving
45 + r = 12

Solving for variable 'r'.

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

Add '-45' to each side of the equation.
45 + -45 + r = 12 + -45

Combine like terms: 45 + -45 = 0
0 + r = 12 + -45
r = 12 + -45

Combine like terms: 12 + -45 = -33
r = -33

Simplifying
r = -33

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