3r-5s=9

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Solution for 3r-5s=9 equation: 


Simplifying
3r + -5s = 9

Solving
3r + -5s = 9

Solving for variable 'r'.

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

Add '5s' to each side of the equation.
3r + -5s + 5s = 9 + 5s

Combine like terms: -5s + 5s = 0
3r + 0 = 9 + 5s
3r = 9 + 5s

Divide each side by '3'.
r = 3 + 1.666666667s

Simplifying
r = 3 + 1.666666667s

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