<PRE><B>Question 221404</B>
A girl is 3 years old and her brother is 3 times older than her. when she turns 7, how old will her brother be?


Step 1.  Let 3*3=9 be age of brother since he is 3 times older than her.


Step 2.  Then 7-3=4 years difference between now at age 3 and 4 years from now at age 7.


Step 3.  Then her brother will be 9+4=13.


Step 4.  ANSWER:  In 4 years, her brother is 13 years old.


I hope the above steps were helpful.


For FREE Step-By-Step videos in Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.


Good luck in your studies!


Respectfully,
Dr J</PRE>