Kristen spent $144 dollars on shirts. Fancy shirts cost $28 dollars and plain shirts cost $15 dollars. If she bought a total of 7 shirts then how many of each kind did she buy?

Question

I need to know how to turn this into an equation and how to solve it with a graph, substitution, and elimination.

Answer 1

28F + 15P = 144

7= F+ P

F +P = 7

15F + 15P = 7(15) = 105

subtract

13F = 39

F = 39/13 = 3 = number of fancy shirts purchased

P = 4 = number of plain shirts purchased