Mathematics, 28.12.2019 07:31 esmeralda266
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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