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anonymous551

  • 3 years ago

Solve. Check. Explain. 2x-5=y x-7=-y Addition/Elimination Method. (I'm a visual learner)

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  1. ajprincess
    • 3 years ago
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    Add both the equations. Can u plz tell me vat u get @anonymous551?

  2. anonymous551
    • 3 years ago
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    3x - 12y = 0

  3. ajprincess
    • 3 years ago
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    U r partly right. Plz check -12y

  4. anonymous551
    • 3 years ago
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    3x - 12 = 0y ..? or 3x +12 = 0y

  5. ajprincess
    • 3 years ago
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    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?

  6. anonymous551
    • 3 years ago
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    3x-12=0 +12 +12 3x = 12 --------- x = 4

  7. ajprincess
    • 3 years ago
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    ya perfect:) Now plug in that value of x in 2x-5=y to find y. Can u do it?

  8. anonymous551
    • 3 years ago
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    2(4) - 5 = y 8 - 5 = y 3 = y

  9. ajprincess
    • 3 years ago
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    ya perfect:)

  10. anonymous551
    • 3 years ago
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    NO. Sorry. 2x -5 = 3

  11. anonymous551
    • 3 years ago
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    because 3 = Y

  12. ajprincess
    • 3 years ago
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    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

  13. anonymous551
    • 3 years ago
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    Wait. One second..

  14. anonymous551
    • 3 years ago
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    Oh.. Okay. 2x - 5 = y 2(4) - 5 = 3 8 - 5 = 3 True. x-7=-y (4) - 7 = -(3) -3 =-3 true.

  15. anonymous551
    • 3 years ago
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    I though the equation was 2x - 12 for some reason.. Thanks for going through this w/ me.

  16. anonymous551
    • 3 years ago
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    :)

  17. anonymous551
    • 3 years ago
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    But you need to improve you explanation. If I didn't already know how to do this, I would have been so confused.

  18. ajprincess
    • 3 years ago
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    Welcome:) oh sorry. anyways thanx for the feedback:)

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