algebra
posted by Evelyn
Aaron is 13 years older than shelby. in nine years, Aaron will be twice as old as shelby. how old is shelby?

Steve
a = s+13
(a+9) = 2(s+9)
a  s = 13
a  2s = 9
s = 4
a = 17
in 9 years:
s = 13
a = 26
Respond to this Question
Similar Questions

math
is this right? today is vanessa's birthday she is now 3 times the age of her daughte, shelby. Shelby is twice the age of her brother caleb. if caleb is now 6, how old is Vanessa? 
algebra
A person is 3 times as old as aonther person but in 15 years she will only be 2 times as old. I found the answer the younger person is 15 years old and the older person is 45 years old. But 15 years from now the younger person will … 
psy.
5. Shelby is a very outgoing person who likes being around other people and socializing with them. According to the Big Five trait theory of personality, Shelby would be considered to be: (Points: 5) showing signs of her masculine … 
math
aaron is 13 years older than shelby. in nine years aaron will be twice as old as shelby. how old is shelby? 
math
A. Brad is 12 years older than Sam . If Brad were 8 years older than he is now. he would be twice as old as Sam. How old is Sam now? 
Math Homework, Help
Aaron is 21 years younger than Ryan. In 5 years Ryan will be twice as old as Aaron. How old are they now? 
math
Shelby is organizing her 30 ribbons she won for competitions. She has twice as many first place ribbons as she does second place ribbons. How many firstplace ribbons does Shelby have? 
math
Shelby walks at a constant rate. the equation that represents this relationship is d=4t, where d is the distance in miles and t is the time in hours. What does the constant 4 tell you about shelby? 
Math
Aaron's father is nine times as old as he is. One year ago, he was two years more than eleven as old as Aaron. Find Aaron's present age. 
Math
Aaron and ron are brothers. four years later,ron will be twice as old as aaron. Find their present ages