Answer with explanation:
The expression from which we have to find the value of h and r is
[tex]x=r- \frac{h}{y}[/tex]
Adding [tex]\frac{h}{y}[/tex] on both sides
[tex]r=x+\frac{h}{y}[/tex]
Subtracting x from both sides
[tex]\frac{h}{y}=r-x\\\\y=\frac{h}{r-x}[/tex]