Question

Bruce and Mila are collecting baseball cards from their favorite teams, the Orioles and the Pirates. The equation r+p=28 represents the number of cards Bruce has. The equation 2r+p=43 represents the number of cards Mila has.

Answer 1

r+p=28 → p=28-r
2r+28-r=43 → r=15
p=28-15=13
Bruce has 15 Orioles cards and 13 Pirates cards
Mila has 30 Orioles cards and13 Pirates cards
So they have 45 Orioles cards and 26 Pirates cards