anonymous
  • anonymous
Solve. Check. Explain. 2x-5=y x-7=-y Addition/Elimination Method. (I'm a visual learner)
Mathematics
schrodinger
  • schrodinger
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ajprincess
  • ajprincess
Add both the equations. Can u plz tell me vat u get @anonymous551?
anonymous
  • anonymous
3x - 12y = 0
ajprincess
  • ajprincess
U r partly right. Plz check -12y

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anonymous
  • anonymous
3x - 12 = 0y ..? or 3x +12 = 0y
ajprincess
  • ajprincess
hmm it is 3x-12=0 2x-5=y-(1) x-7=-y-(2) (1)+(2)=>2x-5+x-7=y-y 3x-12=0 Nw using 3x-12=0 Can u find x @anonymous551?
anonymous
  • anonymous
3x-12=0 +12 +12 3x = 12 --------- x = 4
ajprincess
  • ajprincess
ya perfect:) Now plug in that value of x in 2x-5=y to find y. Can u do it?
anonymous
  • anonymous
2(4) - 5 = y 8 - 5 = y 3 = y
ajprincess
  • ajprincess
ya perfect:)
anonymous
  • anonymous
NO. Sorry. 2x -5 = 3
anonymous
  • anonymous
because 3 = Y
ajprincess
  • ajprincess
x=4 and y=3 is correct. Nw plug in these values in x-7=-y and check if Right hand side = left hand side
anonymous
  • anonymous
Wait. One second..
anonymous
  • anonymous
Oh.. Okay. 2x - 5 = y 2(4) - 5 = 3 8 - 5 = 3 True. x-7=-y (4) - 7 = -(3) -3 =-3 true.
anonymous
  • anonymous
I though the equation was 2x - 12 for some reason.. Thanks for going through this w/ me.
anonymous
  • anonymous
:)
anonymous
  • anonymous
But you need to improve you explanation. If I didn't already know how to do this, I would have been so confused.
ajprincess
  • ajprincess
Welcome:) oh sorry. anyways thanx for the feedback:)

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