r-0.1=-0.8

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Solution for r-0.1=-0.8 equation: 


Simplifying
r + -0.1 = -0.8

Reorder the terms:
-0.1 + r = -0.8

Solving
-0.1 + r = -0.8

Solving for variable 'r'.

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

Add '0.1' to each side of the equation.
-0.1 + 0.1 + r = -0.8 + 0.1

Combine like terms: -0.1 + 0.1 = 0.0
0.0 + r = -0.8 + 0.1
r = -0.8 + 0.1

Combine like terms: -0.8 + 0.1 = -0.7
r = -0.7

Simplifying
r = -0.7

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