r-3-3r=9

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Solution for r-3-3r=9 equation: 


Simplifying
r + -3 + -3r = 9

Reorder the terms:
-3 + r + -3r = 9

Combine like terms: r + -3r = -2r
-3 + -2r = 9

Solving
-3 + -2r = 9

Solving for variable 'r'.

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

Add '3' to each side of the equation.
-3 + 3 + -2r = 9 + 3

Combine like terms: -3 + 3 = 0
0 + -2r = 9 + 3
-2r = 9 + 3

Combine like terms: 9 + 3 = 12
-2r = 12

Divide each side by '-2'.
r = -6

Simplifying
r = -6

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