A pineapple cost $4.99. Together one banana and one pineapple cost the same as 13 bananas. What does one banana cost?

Question

A pineapple cost $4.99. Together one banana and one pineapple cost the same as 13 bananas. What does one banana cost?

Answer 1

you wrote A pineapple cost $4.99. Together one banana and one pineapple cost the same as 13 bananas. What does one banana cost?  The first appearance of the word cost ought have been costs because the subject is singular.

 

If 4.99 = price of a pineapple & then b = cost of a banana, then b + 4.99 = 13•b

 

SOLVE FOR b!