Question

Amy is twice as old as jenny. five years ago, amy was three times as old as jenny. find jenny's age.

Answer 1

Let's first find variables for Amy and Jenny.
A = Amy
J = Jenny

Answer 2

Ohhkaay

Answer 3

A = 2J so A - 2J = 0
A - 5 = 3(J - 5)
A - 5 = 3J - 15 + 5
A - 3J = - 10

Since A - 2J = 0
A - 3J = -10
So -J = -10; therefore, J = 10
Now we've found that Jenny is ten, and since Amy is twice as old:
Jenny = 10, Amy = 20

Answer 4

i get it now thanks