Question 3591
this has 2 unknowns, so you will need 2 equations.


First define a couple of things:
Let x = Leah's age now
Let y = Sue's age now

eqn1: x = y+5 --> x-y = 5

eqn2: x+y = 41


Adding these 2 equations together gives 2x = 46, so x (Leah's age) = 23. Hence, Sue must be 18.


jon.