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anonymous

  • one year ago

please help me :) Given the following system of equations x + y = 4k 2x = k where k is a constant Real Number, solve the system for (x, y) in terms of k. Do not replace the constant k with a numerical value. Give your solution as an ordered pair.

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  1. anonymous
    • one year ago
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    \[\left\{\frac{k}{2},\frac{7 k}{2}\right\} \]

  2. anonymous
    • one year ago
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    what?@robtobey

  3. freckles
    • one year ago
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    You can solve it by substitution the 2x=k gives you x=k/2 replace the x in the first equation with k/2 and then solve for y

  4. anonymous
    • one year ago
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    dont understand

  5. freckles
    • one year ago
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    do you see the x=k/2 ? This means x is k/2. Do you see the x in the first equation, the equation that is x+y=4k? This means you can place that x in that equation with k/2 .

  6. anonymous
    • one year ago
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    i see that yeah and when you plug it, k/2+y=4y

  7. anonymous
    • one year ago
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    ohh okay got it

  8. freckles
    • one year ago
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    well you replace the k with y why?

  9. freckles
    • one year ago
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    like the first equation was x+y=4k not x+y=4y

  10. freckles
    • one year ago
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    you are just to replace x with k/2 and then solve for y

  11. anonymous
    • one year ago
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    okay

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