2r-3.1=12.5

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Solution for 2r-3.1=12.5 equation: 


Simplifying
2r + -3.1 = 12.5

Reorder the terms:
-3.1 + 2r = 12.5

Solving
-3.1 + 2r = 12.5

Solving for variable 'r'.

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

Add '3.1' to each side of the equation.
-3.1 + 3.1 + 2r = 12.5 + 3.1

Combine like terms: -3.1 + 3.1 = 0.0
0.0 + 2r = 12.5 + 3.1
2r = 12.5 + 3.1

Combine like terms: 12.5 + 3.1 = 15.6
2r = 15.6

Divide each side by '2'.
r = 7.8

Simplifying
r = 7.8

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