Assuming \(P\) is the amount of money they raise and \(N\) is how many tickets sold (Varibles are not too clear), we know the charity sold 1 ticket so \(N=1\).
Using this in the equation makes it:
\(P=70(1)-1500\)
Then distributing makes it:
\(P=70-1500 \)
After subtracting \(P=-1430\)meaning the charity is 1430 in debt.
