Question

300 hotdogs and hamburgers total costing $780. Hotdogs cost $2. Hamburgers cost $3. How many hamburgers? How many hotdogs?

Answer 1

180 hamburgers 120 hotdogs

Answer 2

x: Hotdogs
y: Hamburgers

(1) x + y = 300
(2) 2*x + 3*y = 780

By solving the system above:

x = 120, y = 180

Hence,

120 Hotdogs
180 Hamburgers