Andrea and Beto are siblings. Andrea is 3

Question

years older than Beto, and the sum of their ages is 31

. Which of the following systems of equations could be used to find Andrea's age, a

, and Beto's age, b

?
Choose 1 answer:
Choose 1 answer:
(Choice A)



A


(Choice B)



B


(Choice C)



C


(Choice D)



D


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Answer 1

Let Andrea's age be a and Beto's age be b.

From the information given, we know that:
- Andrea is 3 years older than Beto: a = b + 3
- The sum of their ages is 31: a + b = 31

Therefore, the system of equations that could be used to find Andrea's age (a) and Beto's age (b) is:
a = b + 3
a + b = 31

So the correct answer is (Choice A).