3.9+r=8.5

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Solution for 3.9+r=8.5 equation: 


Simplifying
3.9 + r = 8.5

Solving
3.9 + r = 8.5

Solving for variable 'r'.

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

Add '-3.9' to each side of the equation.
3.9 + -3.9 + r = 8.5 + -3.9

Combine like terms: 3.9 + -3.9 = 0.0
0.0 + r = 8.5 + -3.9
r = 8.5 + -3.9

Combine like terms: 8.5 + -3.9 = 4.6
r = 4.6

Simplifying
r = 4.6

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