9-3r=13

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Solution for 9-3r=13 equation: 


Simplifying
9 + -3r = 13

Solving
9 + -3r = 13

Solving for variable 'r'.

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

Add '-9' to each side of the equation.
9 + -9 + -3r = 13 + -9

Combine like terms: 9 + -9 = 0
0 + -3r = 13 + -9
-3r = 13 + -9

Combine like terms: 13 + -9 = 4
-3r = 4

Divide each side by '-3'.
r = -1.333333333

Simplifying
r = -1.333333333

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