Answer:
49 Dogs
Explanation:
Cats : Dogs
4 : 7
4C + 7D = 11 CD
CCCC DDDDDDD = 11 pets
77 / 11 = 7
CCCC * 7 = CCCCCCCCCCCCCCCCCCCCCCCCCCCCC = 28 cats
DDDDDDD * 7 = 49 dogs
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