r+19=31

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Solution for r+19=31 equation: 


Simplifying
r + 19 = 31

Reorder the terms:
19 + r = 31

Solving
19 + r = 31

Solving for variable 'r'.

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

Add '-19' to each side of the equation.
19 + -19 + r = 31 + -19

Combine like terms: 19 + -19 = 0
0 + r = 31 + -19
r = 31 + -19

Combine like terms: 31 + -19 = 12
r = 12

Simplifying
r = 12

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