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anonymous

  • one year ago

A student is trying to solve the system of two equations given below: Equation P: y + z = 6 Equation Q: 3y + 4z = 1 Which of these is a possible step used in eliminating the y-term? (y + z = 6) ⋅ 4 (3y + 4z = 1) ⋅ 4 (y + z = 6) ⋅ −3 (3y + 4z = 1) ⋅ 3

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  1. anonymous
    • one year ago
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    @sleepyjess

  2. sleepyjess
    • one year ago
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    We want to be able to multiply the first equation by something that will cancel out y. So if we have 3y on one equation, do we want -3y or 3y to cancel it out?

  3. anonymous
    • one year ago
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    -3y to cancle out 3y

  4. sleepyjess
    • one year ago
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    Yes! So to get -3y, would you multiply by -3 or 3?

  5. anonymous
    • one year ago
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    3?

  6. sleepyjess
    • one year ago
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    y*3 = 3y, we want -3y

  7. anonymous
    • one year ago
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    ohh ok ,ok i got it its C

  8. sleepyjess
    • one year ago
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    yep :)

  9. anonymous
    • one year ago
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    one more ill post it now

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