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3r-3+\left(r-3\right)\times 3=\left(r+6\right)\times 2
Variable r cannot be equal to any of the values -6,3 since division by zero is not defined. Multiply both sides of the equation by \left(r-3\right)\left(r+6\right), the least common multiple of r^{2}+3r-18,r+6,r-3.
3r-3+3r-9=\left(r+6\right)\times 2
Use the distributive property to multiply r-3 by 3.
6r-3-9=\left(r+6\right)\times 2
Combine 3r and 3r to get 6r.
6r-12=\left(r+6\right)\times 2
Subtract 9 from -3 to get -12.
6r-12=2r+12
Use the distributive property to multiply r+6 by 2.
6r-12-2r=12
Subtract 2r from both sides.
4r-12=12
Combine 6r and -2r to get 4r.
4r=12+12
Add 12 to both sides.
4r=24
Add 12 and 12 to get 24.
r=\frac{24}{4}
Divide both sides by 4.
r=6
Divide 24 by 4 to get 6.