Solve for r
r=\frac{7}{3}-25x
Solve for x
x=-\frac{r}{25}+\frac{7}{75}
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3r=7-75x
Subtract 75x from both sides.
\frac{3r}{3}=\frac{7-75x}{3}
Divide both sides by 3.
r=\frac{7-75x}{3}
Dividing by 3 undoes the multiplication by 3.
r=\frac{7}{3}-25x
Divide 7-75x by 3.
75x=7-3r
Subtract 3r from both sides.
\frac{75x}{75}=\frac{7-3r}{75}
Divide both sides by 75.
x=\frac{7-3r}{75}
Dividing by 75 undoes the multiplication by 75.
x=-\frac{r}{25}+\frac{7}{75}
Divide 7-3r by 75.
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