Awnser what is the unit rate for 220 students on 5 buses

Me find the value of x each figure.

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

Can you divide 25 into 4 equal groups? explain why or why not.