Choose the answer.
Matthew is 5 years older than twice the age of his sister. If Matthew is 13, how old is his sister?
Question 4 options:
3
4
9
31
Let's let x represent the age of Matthew's sister. The problem tells us that Matthew is 5 years older than twice the age of his sister, so we can write the equation 13 = 2x + 5.
Subtracting 5 from both sides gives us 8 = 2x.
Dividing both sides by 2 gives us x = 4.
Therefore, Matthew's sister is 4 years old.
The answer is 4.