As given that P as profit and m as amount of money and h as hours:
[tex]P=m-(250+4h)[/tex]
The equation to calculate the amount of money m when profit is $415:
Put the the value of P as 415 in given equation:
[tex]\begin{gathered} 415=m-(250+4h) \\ 415=m-250-4h \\ 415+250+4h=m \\ m=665+4h \end{gathered}[/tex]
So the desired equation for calculate amount of money m is:
[tex]m=665+4h[/tex]
