3+r=45

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Solution for 3+r=45 equation: 


Simplifying
3 + r = 45

Solving
3 + r = 45

Solving for variable 'r'.

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

Add '-3' to each side of the equation.
3 + -3 + r = 45 + -3

Combine like terms: 3 + -3 = 0
0 + r = 45 + -3
r = 45 + -3

Combine like terms: 45 + -3 = 42
r = 42

Simplifying
r = 42

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