aileen's brother is twice as old as her. Ten years from now, her brother will be 13 years older than her. what is aileen's age?

Answer 1

her age now --- x
his age now --- 2x

in 10 years:
her age = x+10
his age = 2x+10

(2x+10) -(x+10) = 13
x = 13

She is now 13

check:
her age now is 13
his age now is 26

in 10 yrs, she will be 23 , he will be 36
difference in their ages = 36-23 = 13
All is good