31+2r=57

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Solution for 31+2r=57 equation: 


Simplifying
31 + 2r = 57

Solving
31 + 2r = 57

Solving for variable 'r'.

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

Add '-31' to each side of the equation.
31 + -31 + 2r = 57 + -31

Combine like terms: 31 + -31 = 0
0 + 2r = 57 + -31
2r = 57 + -31

Combine like terms: 57 + -31 = 26
2r = 26

Divide each side by '2'.
r = 13

Simplifying
r = 13

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