Posted by Annia on Wednesday, December 9, 2009 at 6:18pm.
Let x be Jack's age.
Let y be Jen's age.
x = 2y - 2
x + 3y = 66
So:
2y - 2 + 3y = 66
5y - 2 = 66
5y = 68
y = 13.6.
So she's about 13 and a half years old.
Related Questions
Math - This Christmas,your brother Jack will be 2 years from being twice as old ...
Algebra - this december your brother jack will be 2 years from being twice as ...
math - your brother jack will be 2 years from being twice as old as your sister ...
math - Jack is twice as old as he was 5 years ago. His mother was then six times...
Math - Alice is three times as old as Jack. In 10 years she will be twice as ...
math - Mary, who is sixteen years old, is four times as old as her brother. How...
math - you are 6 years older than your sister she is 4 years older than your ...
Math - Mark is 11 years older than his sister. In 8 years he will be twice as ...
math - a boy is 17 years old and his sister is as twice as old. when the boy is ...
9th grade math word problems - i never can do word problems....please help... i ...
For Further Reading
