Seudónimo Seudónimo
  • 11-05-2016
  • Mathematics
contestada

Ethan is 40 years old. His son is 12 years old.

How many years ago was Ethan 5 times older than his son?

Respuesta :

pankake123
pankake123 pankake123
  • 11-05-2016
20 years in the future......
Answer Link
wegorkie wegorkie
  • 11-05-2016
40-x / 12-x = 5
40-x = 5 * (12-x)
40-x = 60 - 5*x
5*x-x = 60 - 40
4*x=20
x=5

It was 5 years ago. Ethan was 35 and son was 7.
Answer Link

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