Answer:
17 and 12 is your answer
Explanation:
June is 3 years older than twice her sisters age the how old are June and her sister?
Notice I highlighted the most important details of the question. This will see what you are required to do in order to solve this question.
3 years older than twice her sisters age: 3+3=6
sum of their ages is 30 years old: One sister is 17 and the other is 12
We know that we had to add 6 years to one sister and then do the rest even.
So that you get your answer 17 and 12.