r+31=16

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Solution for r+31=16 equation: 


Simplifying
r + 31 = 16

Reorder the terms:
31 + r = 16

Solving
31 + r = 16

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 = 16 + -31

Combine like terms: 31 + -31 = 0
0 + r = 16 + -31
r = 16 + -31

Combine like terms: 16 + -31 = -15
r = -15

Simplifying
r = -15

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