SOLUTION: Marks's brother is five years older than Mark. Thier combined ages add up to 23, how old is Mark?

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Question 1105047: Marks's brother is five years older than Mark. Thier combined ages add up to 23, how old is Mark?

Found 2 solutions by josgarithmetic, leslielai89:
Answer by josgarithmetic(39628) About Me  (Show Source):
You can put this solution on YOUR website!
m Mark
b Brother

system%28b=m%2B5%2Cm%2Bb=23%29

Answer by leslielai89(5) About Me  (Show Source):
You can put this solution on YOUR website!
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Q : Marks's brother is five years older than Mark.
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let Mark's age is x
then Mark's brother is x+5
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Q: Their combined ages add up to 23, how old is Mark?
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combined means sum
Mark + Mark's brother = 23
(x)+(x+5)=23
2x=23-5
2x=18
x=9
Therefore, Mark's age is 9 years old