Alvin is 13 years younger than Elga. The sum of their ages is 27. What is Elga's age?
2 answers:
Step-by-step explanation:
Let A be Alvin's age and E be Elga's age
A + E = 27
also A + 13 = E
Substitute for A in the first equation
E -13 + E = 27
2E = 40
E = 20, so Elga is 20 years old and Alvin is 7.
Answer:
14
Step-by-step explanation:
27-13
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