SOLUTION: jim is 3 years older than his sister kim theirs ages add up to 13 how old is jim and how old is kim

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Question 379067: jim is 3 years older than his sister kim theirs ages add up to 13
how old is jim and how old is kim
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
jim is 3 years older than his sister kim; their ages add up to 13
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Equations:
j + k = 13
j = k +3
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Substitute for "j" and solve for "k":
k+3 + k = 13
2k = 10
k = 5 yrs old (Kim's age now)
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Since j = k+3, Jim's age = 8 yrs
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Cheers,
Stan H.