Question 371633
Jack is 5 years older than his sister Mary. The sum of their ages is 37. How old is Jack. Show your work.
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Equations:
j = m+5
j+m = 37
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Substitute for "j" and solve for "m":
m+5 + m = 37
2m = 32
m = 16 (Mary's age now)
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Since j = m+5, j = 21 (Jack's age now)
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Cheers,
Stan H.