From the condition, you have these system of two equations 10x + 6y = 1000 (1) (restriction on the board of feet of oak) 5x + 4y = 600 (2) (restriction on the board of feet of cedar) where x = # of desks of the first type and y = # of desks of the second type. The setup is done. Now you solve the system by any method you prefer/know.