The quotient of a number and 2 is 13.

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! )

What is the difference between a linear interval and a nonlinear interval?

What is the solution to this system of linear equations? 2x + 3y = 3 tx-3y= 24