r-8.9=-8.7

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Solution for r-8.9=-8.7 equation: 


Simplifying
r + -8.9 = -8.7

Reorder the terms:
-8.9 + r = -8.7

Solving
-8.9 + r = -8.7

Solving for variable 'r'.

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

Add '8.9' to each side of the equation.
-8.9 + 8.9 + r = -8.7 + 8.9

Combine like terms: -8.9 + 8.9 = 0.0
0.0 + r = -8.7 + 8.9
r = -8.7 + 8.9

Combine like terms: -8.7 + 8.9 = 0.2
r = 0.2

Simplifying
r = 0.2

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