r-2.5=9

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Solution for r-2.5=9 equation: 


Simplifying
r + -2.5 = 9

Reorder the terms:
-2.5 + r = 9

Solving
-2.5 + r = 9

Solving for variable 'r'.

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

Add '2.5' to each side of the equation.
-2.5 + 2.5 + r = 9 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + r = 9 + 2.5
r = 9 + 2.5

Combine like terms: 9 + 2.5 = 11.5
r = 11.5

Simplifying
r = 11.5

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