r-7.8=-7.7

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Solution for r-7.8=-7.7 equation: 


Simplifying
r + -7.8 = -7.7

Reorder the terms:
-7.8 + r = -7.7

Solving
-7.8 + r = -7.7

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 = -7.7 + 7.8

Combine like terms: -7.8 + 7.8 = 0.0
0.0 + r = -7.7 + 7.8
r = -7.7 + 7.8

Combine like terms: -7.7 + 7.8 = 0.1
r = 0.1

Simplifying
r = 0.1

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