anonymous
  • anonymous
In 15 years, Maya will be twice as old as David is now. In 15 years, David will be as old as Maya will be 10 years from now. How old are Maya and David now?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
m+15 = 2d d+15= m + 10 d=20, m = 25
anonymous
  • anonymous
wait how do i work the problem
anonymous
  • anonymous
well the way i see it is that M+15 = 2d D+15M=10 tho

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anonymous
  • anonymous
so the way you would work it out is i belive add i am not sure hold on
anonymous
  • anonymous
try what we did last time substitution m+15 = 2d so then m = 2d - 15 so in the second equation d + 15 = m + 10 use m= 2d -15 d+ 15 = (2d-15) + 10 you get d + 15 = 2d - 5 solve for d you get d = 20 then go back to m + 15 = 2d since d = 20 you get m + 15 = 2(20) so then m = 2(20) - 15 = 25
anonymous
  • anonymous
ok thank you so much
anonymous
  • anonymous
ok hold on he might be right but i belive there is another way an eser way
anonymous
  • anonymous
there is another way but substitution is usually best if they cant get it...its a little longer but it can help them...you can use elimination and it would work just as well
anonymous
  • anonymous
it works when they have trouble setting up or "seeing" the problem
anonymous
  • anonymous
ik that but i am talking about anther way u have never did it then if so you would no
anonymous
  • anonymous
dude its a system of equations......
anonymous
  • anonymous
plus she is probably in algebra 1 or something so its elementary............you have to use methods that they can use..........you cant just pull out tricks from upper level math and expect them to reproduce the result.
anonymous
  • anonymous
ok your right

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