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.
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Home » Mathematics » 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.