Question

what's the equation for this?

Audrey is 5/6 as old as Bettina. Five years ago, Audrey was 4/5 as old as Bettina was then. What are their present ages?

Answer 1

Let Audrey's current age be denoted by x.
Let Bettina's current age be denoted by y.
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Audrey is 5/6 as old as Bettina.
So, x = (5/6) *
Five years ago, Audrey was 4/5 as old as Bettina was then.
Five years ago, Audrey was (x -5) years old.
Five years ago, Bettina was (y - 5) years old.
So, (x - 5) = (4/5) (y - 5) **

x = (5/6) *
(x - 5) = (4/5) (y - 5) **
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Solve these two equations in two unknowns simultaneously.
x (Audrey) = 25 and y (Bettina) = 30

@danielle02

Answer 2

thanks @Directrix

Answer 3

Glad to help. Any other math problems?