r-31=-13

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Solution for r-31=-13 equation: 


Simplifying
r + -31 = -13

Reorder the terms:
-31 + r = -13

Solving
-31 + r = -13

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 + r = -13 + 31

Combine like terms: -31 + 31 = 0
0 + r = -13 + 31
r = -13 + 31

Combine like terms: -13 + 31 = 18
r = 18

Simplifying
r = 18

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