An shelter spends $3.50 per day to each bird and $4.00 per day to care each cat. the shelter use $82.00 for birds and cats. showing a total of 22 birds and cats. How many birds were at the shelter ?

Question

An animal shelter spends $3.50 per day to care for each bird and $4.00 per day to care for each cat. Madelyn noticed that the shelter spent $82.00 caring for birds and cats on Thursday. Madelyn found a record showing that there were a total of 22 birds and cats on Thursday. How many birds were at the shelter on Thursday?

Answer 1

B+C = 22

3.5B + 4C = 82

C = 22-B

3.5B + 4(22 - B) = 82

3.5B + 88 - 4B = 82

-0.5B = -6

B = 12

C=22-B = 22-12 = 10

12 birds and 10 cats

12 * 3.5 + 10*4 = 42 + 40 = 82