3r-s=-9

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Solution for 3r-s=-9 equation: 


Simplifying
3r + -1s = -9

Solving
3r + -1s = -9

Solving for variable 'r'.

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

Add 's' to each side of the equation.
3r + -1s + s = -9 + s

Combine like terms: -1s + s = 0
3r + 0 = -9 + s
3r = -9 + s

Divide each side by '3'.
r = -3 + 0.3333333333s

Simplifying
r = -3 + 0.3333333333s

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