9r-4r=15

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Solution for 9r-4r=15 equation: 


Simplifying
9r + -4r = 15

Combine like terms: 9r + -4r = 5r
5r = 15

Solving
5r = 15

Solving for variable 'r'.

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

Divide each side by '5'.
r = 3

Simplifying
r = 3

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