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12-80.

Maria Elena is collecting college pennants. She has five fewer pennants from Washington campuses than from California campuses and twice as many pennants from California campuses as from Pennsylvania campuses. She has 40 pennants in her collection. Write and solve a system of equations to determine the number of pennants from each state. Homework Help ✎

Let C = the number of pennants from California campuses
W = the number of pennants from Washington campuses
P = the number of pennants from Pennsylvania campuses

C + W + P = 40
W = C − 5
C = 2P