jaeden15 jaeden15

26-01-2021
Mathematics

contestada

5. Mark's brother is five years older than Mark.
Their combined ages add up to 23. How old is
Mark?

Respuesta :

MeiLiuSA MeiLiuSA

26-01-2021

Answer:

9

Step-by-step explanation:

Let's say Mark is M and his brother is B.

M+5=B

M+B=23

Now we can solve using subsitution.

M+M+5=23

(Subtract 5 from both sides)

2M=18

M=9

Hope this helped!

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