r-2.3=-8.4

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Solution for r-2.3=-8.4 equation: 


Simplifying
r + -2.3 = -8.4

Reorder the terms:
-2.3 + r = -8.4

Solving
-2.3 + r = -8.4

Solving for variable 'r'.

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

Add '2.3' to each side of the equation.
-2.3 + 2.3 + r = -8.4 + 2.3

Combine like terms: -2.3 + 2.3 = 0.0
0.0 + r = -8.4 + 2.3
r = -8.4 + 2.3

Combine like terms: -8.4 + 2.3 = -6.1
r = -6.1

Simplifying
r = -6.1

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