Plz help me it just one question ?

Solve for x i'll try to attach the files bc it's not letting me for some reason

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.