Alex and Alicia are twins. Kevin is 5 years older than the twins. Their ages total 53. How old are the twins?

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02-07-2019
Mathematics

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Alex and Alicia are twins. Kevin is 5 years older than the twins. Their ages total 53. How old are the twins?

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anonymous12345678901 anonymous12345678901 · Answer 1 · 2019-07-02T04:27:32+02:00

anonymous12345678901 anonymous12345678901

02-07-2019

Let 2a=Alex and Alicia’s age and a=Alex or Alicia’s age
And k=Kevin’s age
a+5=k
2a+k=53

And to solve use substitution since we already know what k is

2a+(a+5)=53
2a+a+5=53
3a+5=53
3a=48
a=16

And just in case you wanted to know if needed it

16+5=k
21=k

Alex is 16, Alicia is 16 and Kevin is 21

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