r=2x-9

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Solution for r=2x-9 equation: 


Simplifying
r = 2x + -9

Reorder the terms:
r = -9 + 2x

Solving
r = -9 + 2x

Solving for variable 'r'.

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

Simplifying
r = -9 + 2x

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