r-8.2=-7.8

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Solution for r-8.2=-7.8 equation: 


Simplifying
r + -8.2 = -7.8

Reorder the terms:
-8.2 + r = -7.8

Solving
-8.2 + r = -7.8

Solving for variable 'r'.

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

Add '8.2' to each side of the equation.
-8.2 + 8.2 + r = -7.8 + 8.2

Combine like terms: -8.2 + 8.2 = 0.0
0.0 + r = -7.8 + 8.2
r = -7.8 + 8.2

Combine like terms: -7.8 + 8.2 = 0.4
r = 0.4

Simplifying
r = 0.4

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