SOLUTION: Today Ella's uncle Andrew's age is four times Ella's age. In five years' time, Andrew will be three times Ella's age. How old is Ella today?
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Question 1177718: Today Ella's uncle Andrew's age is four times Ella's age. In five years' time, Andrew will be three times Ella's age. How old is Ella today?
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
let Andrew's age be and Ella's age
if today Ella's uncle Andrew's age is Ella's age, we have
.....eq.1
if in years' time, Andrew will be Ella's age, we have
.....eq.2.....solve for
...........eq.2a
from eq.1 and eq.2a we have
.....solve for
=> Ella is years old today
go to
...........eq.2a, substitute
=> Andrew is years old today
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