r+3=20

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Solution for r+3=20 equation: 


Simplifying
r + 3 = 20

Reorder the terms:
3 + r = 20

Solving
3 + r = 20

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 = 20 + -3

Combine like terms: 3 + -3 = 0
0 + r = 20 + -3
r = 20 + -3

Combine like terms: 20 + -3 = 17
r = 17

Simplifying
r = 17

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