Answer:
Wins: 57 games
Losses: 21 games
Explanation:
a + b = 78
a = 2b + 15
a = wins
b = losses
(2b+15) + b = 78
3b + 15 = 78
3b = 78 - 15
3b = 63
b = 63/3
b = 21
a = 2*21 + 15
a = 42 + 15
a = 57
Check:
21 + 57 = 78
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