r+18.5=31

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Solution for r+18.5=31 equation: 


Simplifying
r + 18.5 = 31

Reorder the terms:
18.5 + r = 31

Solving
18.5 + r = 31

Solving for variable 'r'.

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

Add '-18.5' to each side of the equation.
18.5 + -18.5 + r = 31 + -18.5

Combine like terms: 18.5 + -18.5 = 0.0
0.0 + r = 31 + -18.5
r = 31 + -18.5

Combine like terms: 31 + -18.5 = 12.5
r = 12.5

Simplifying
r = 12.5

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