r-8.5=-2.1

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Solution for r-8.5=-2.1 equation: 


Simplifying
r + -8.5 = -2.1

Reorder the terms:
-8.5 + r = -2.1

Solving
-8.5 + r = -2.1

Solving for variable 'r'.

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

Add '8.5' to each side of the equation.
-8.5 + 8.5 + r = -2.1 + 8.5

Combine like terms: -8.5 + 8.5 = 0.0
0.0 + r = -2.1 + 8.5
r = -2.1 + 8.5

Combine like terms: -2.1 + 8.5 = 6.4
r = 6.4

Simplifying
r = 6.4

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