r-7.8=2.5

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Solution for r-7.8=2.5 equation: 


Simplifying
r + -7.8 = 2.5

Reorder the terms:
-7.8 + r = 2.5

Solving
-7.8 + r = 2.5

Solving for variable 'r'.

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

Add '7.8' to each side of the equation.
-7.8 + 7.8 + r = 2.5 + 7.8

Combine like terms: -7.8 + 7.8 = 0.0
0.0 + r = 2.5 + 7.8
r = 2.5 + 7.8

Combine like terms: 2.5 + 7.8 = 10.3
r = 10.3

Simplifying
r = 10.3

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