300
Subway sandwiches, X, cost 12 rmb. Soup,Y, costs 6 rmb. If you have 72 rmb, what equation could show how all the possible combinations of soups and sandwiches you could buy?
Give 2 possible solutions that would satisfy the equation.
12X + 6Y =72
Possible solutions: 0 sandwiches, 12 soups; 6 sandwiches, 0 soups.