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Question

An animal shelter spends $2.50 per day to care for each bird and $3.50 per day to care for each cat. Henry noticed that the shelter spent $81.50 caring for birds and cats on Friday. Henry found a record showing that there were a total of 29 birds and cats on Friday. How many birds were at the shelter on Friday?

Answer 1

b + c = 29 ----> b = 29 - c

2.5b + 3.5c = 81.5

 

2.5(29 - c) + 3.5c = 81.5

72.5 - 2.5c + 3.5c = 81.5

1.5c = 9

c = 6

 

b = 29 - 6 = 23