Answer:
Rachel is 36.5 years old
Sarah is 30.5 years old
Explanation:
Their ages add to 67, so 67 divided by 2 is 33.5 (each)
Rachel is 3 years older than Sarah, so to add 3 years old for Rachel and minus 3 years old for Sarah.
Rachel is 33.5 years old + 3 years old = 36.5 years old
Sarah is 33.5 years old - 3 years old = 30.5 years old