Mathstar209 Mathstar209
  • 02-04-2020
  • Mathematics
contestada

Mary is three times as old as her son . In 12 years Mary will be twice as old as her son. How old is each of them now?

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sqdancefan
sqdancefan sqdancefan
  • 06-04-2021

9514 1404 393

Answer:

  Mary: 36

  Mary's son: 12

Step-by-step explanation:

Let s represent the son's age now. Then in 12 years, we have the relationship ...

  2(s +12) = 3s +12

  12 = s . . . . . . . . . . . subtract 2s+12 from both sides

Mary is 36; her son is 12.

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