Solve for q
q=\frac{r+6}{2}
Solve for r
r=2\left(q-3\right)
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10q=30+5r
Add 5r to both sides.
10q=5r+30
The equation is in standard form.
\frac{10q}{10}=\frac{5r+30}{10}
Divide both sides by 10.
q=\frac{5r+30}{10}
Dividing by 10 undoes the multiplication by 10.
q=\frac{r}{2}+3
Divide 30+5r by 10.
-5r=30-10q
Subtract 10q from both sides.
\frac{-5r}{-5}=\frac{30-10q}{-5}
Divide both sides by -5.
r=\frac{30-10q}{-5}
Dividing by -5 undoes the multiplication by -5.
r=2q-6
Divide 30-10q by -5.
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