Solve for r
r=-\frac{5}{y}
y\neq 0
Solve for x
x\in \mathrm{R}
r=-\frac{5}{y}\text{ and }y\neq 0
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ry=0-5
Anything times zero gives zero.
ry=-5
Subtract 5 from 0 to get -5.
yr=-5
The equation is in standard form.
\frac{yr}{y}=-\frac{5}{y}
Divide both sides by y.
r=-\frac{5}{y}
Dividing by y undoes the multiplication by y.
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