Solve for q
q=\frac{r}{3}-\frac{2}{9}
Solve for r
r=3q+\frac{2}{3}
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9q=3r-6+4
Add 4 to both sides.
9q=3r-2
Add -6 and 4 to get -2.
\frac{9q}{9}=\frac{3r-2}{9}
Divide both sides by 9.
q=\frac{3r-2}{9}
Dividing by 9 undoes the multiplication by 9.
q=\frac{r}{3}-\frac{2}{9}
Divide 3r-2 by 9.
3r-6=9q-4
Swap sides so that all variable terms are on the left hand side.
3r=9q-4+6
Add 6 to both sides.
3r=9q+2
Add -4 and 6 to get 2.
\frac{3r}{3}=\frac{9q+2}{3}
Divide both sides by 3.
r=\frac{9q+2}{3}
Dividing by 3 undoes the multiplication by 3.
r=3q+\frac{2}{3}
Divide 9q+2 by 3.
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