9r+11r=80

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Solution for 9r+11r=80 equation: 


Simplifying
9r + 11r = 80

Combine like terms: 9r + 11r = 20r
20r = 80

Solving
20r = 80

Solving for variable 'r'.

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

Divide each side by '20'.
r = 4

Simplifying
r = 4

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