Question

Please help! Kylie is 231 miles away from Anna. They are traveling towards each other. If Anna travels 9 mph faster than Kylie and they meet after 7 hours, how fast was each traveling?

Answer 1

a will represent Anna. k will represent Kylie.

7a+7k=231
a=9+k

Substitute for a
7(9+k)+7k=231
63+7k+7k=231
14k=168
k=12

Then plug in the k value
a=9+12
a=21

Final answer: Anna=21 mph, Kylie= 12 mph