Question

At a pet store, it costs $5 to wash a cat and $7.50 to wash a dog. Last week, the store made $60 dollars from washing cats and dogs. If 6 cats were washed, write and solve a linear equation to find how many dogs were washed.

Answer 1

d = number of dogs washed
c = number of cats washed

d = (60 - 5c) / 7.50
The 7.50 should be underneath the brackets