2r-9=

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Solution for 2r-9= equation: 


Simplifying
2r + -9 = 0

Reorder the terms:
-9 + 2r = 0

Solving
-9 + 2r = 0

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 9 + 2r = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 2r = 0 + 9
2r = 0 + 9

Combine like terms: 0 + 9 = 9
2r = 9

Divide each side by '2'.
r = 4.5

Simplifying
r = 4.5

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