anonymous
  • anonymous
the ages of two brothers are in the ratio two to three,but in eight years the ratio of ther ages will be three to four .findtheir presentage
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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julie
  • julie
hmmmm, so you want to turn this into a series of equations based on the rules outlined in the word problem. and then solve them.
julie
  • julie
so how can you write one of the equations given the first piece of information?
julie
  • julie
e.g. \[y = 2x/3\]

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julie
  • julie
where y = younger, and x = older
julie
  • julie
but since there are two variables in this problem, you need a second equation to solve
julie
  • julie
(the two present ages are the two variables)
julie
  • julie
so we know in 8 years, that the ratio will actually be 3/4, not 2/3
julie
  • julie
so: y+8/x+8 = 3/4
julie
  • julie
now that you have two unknown variables (the present ages), and two equations, you can solve the problem by substituting the first (y=2x/3) into the second.
anonymous
  • anonymous
thank you :)
julie
  • julie
no problem!

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