anonymous
  • anonymous
solve the system using any method: 6x-10y=12 -15x+25y=-30
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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jdoe0001
  • jdoe0001
so, pick a method and use that :)
anonymous
  • anonymous
how about the observe method?
jdoe0001
  • jdoe0001
hehe

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anonymous
  • anonymous
i like elimination... especially in this problem
jdoe0001
  • jdoe0001
yes, elimination would be simpler
anonymous
  • anonymous
eliminate x
anonymous
  • anonymous
just a suggestion...
wolf1728
  • wolf1728
A) 6x-10y=12 B) -15x+25y=-30 What about multiplying equation A by 2.5?
anonymous
  • anonymous
yuck... mult 1st by 5 and 2nd by 2
anonymous
  • anonymous
ok thank you both!
wolf1728
  • wolf1728
pgpilot326 - Isn't it better and easier just to multiply one equation?
wolf1728
  • wolf1728
Multiplying equation A makes it become A) 15x-25y=30 Then add this to equation B B) -15x+25y=-30
anonymous
  • anonymous
just depends... in the end, the answer is the same.
wolf1728
  • wolf1728
Wow - it looks as though the 2 equations are identical - then no solution?
anonymous
  • anonymous
not exactly... if they're the same then there are an infinite number of solutions
wolf1728
  • wolf1728
okay - yes - I consider it no solution - it's a lot less to write on a test or homework assignment. :-)
anonymous
  • anonymous
but it's wrong to say no solution!
wolf1728
  • wolf1728
yes - you are right of course I would not want a professor or teacher to ask for ALL solutions - writer's cramp would ensue.
anonymous
  • anonymous
you simply say all solutions are of the form (x, 3/5 x - 6/5) where x is any reall number.
wolf1728
  • wolf1728
okay - a mathematically elegant answer.

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