Mathematics

2 May, 12:34

Lian and her younger sister Ella are 4 years apart. The sum of their ages is 20. Let l be Lian's age in years and let e be Ella's age in years.

The system of linear equations that models the scenario is:

l - 4 = e

l + e = 20

How old is each sister?

Lian is years old and Ella is years old.

+3

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