radomes.openskiesproject.org
nisey3 nisey3
  • 16-05-2016
  • Mathematics
Answered

Sarah is twice as old as her youngest brother if the difference between their ages is 15 years how old is her youngest brother

Verified Answer :

cutelion918
cutelion918 cutelion918
  • 16-05-2016

He is 15 years old.

You would set up a system of equations

S = Sarah

Y = Youngest brother


S = 2Y

S-Y= 15


Substitute 2Y for S

So 2Y-Y= 15

Y= 15

and that's your answer :-)

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