Write a system of equations that can be used to solve the following problem. then solve the system and determine the answer. jaafar owns a total of 50 shares of stock, some in stock a and some in stock b. on a particular day, stock a closed at $74 per share and stock b closed at $84 per share. if jaafar's stock for these companies was worth $4040, how many shares of each type of stock does he own? let x denote the number of shares of stock a that jaafar owns. let y denote the number of shares of stock b that jaafar owns. write the equation corresponding to the first sentence of the problem statement ("jaafar owns a total of 50 shares of stock"). the first equation is x plus y equals 50. write an equation relating x and y that corresponds to the second and third sentences of the problem statement. the second equation is 74 x plus 84 y equals 4040. jaafar owns nothing shares of stock a and nothing shares of stock b.