45+3r=90

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Solution for 45+3r=90 equation: 


Simplifying
45 + 3r = 90

Solving
45 + 3r = 90

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 + 3r = 90 + -45

Combine like terms: 45 + -45 = 0
0 + 3r = 90 + -45
3r = 90 + -45

Combine like terms: 90 + -45 = 45
3r = 45

Divide each side by '3'.
r = 15

Simplifying
r = 15

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