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cieracabrera Group Title

x+y=-7 2x-y=-8

  • one year ago
  • one year ago

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  1. shamil98 Group Title
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    I'm guessing you want to solve the system.

    • one year ago
  2. shamil98 Group Title
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    To do so just add the equations. \[\huge \left(\begin{matrix} x+y = -7 \\ 2x-y=-8\end{matrix}\right)\]

    • one year ago
  3. shamil98 Group Title
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    What do you get?

    • one year ago
  4. cieracabrera Group Title
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    you would get 2x=-15 i think cuz you cross out either the x or y

    • one year ago
  5. cieracabrera Group Title
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    i cross out the y

    • one year ago
  6. Hidden_Twilight Group Title
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    x+y=-7 2x-y=-8 ---------- 3x - 0 = -15 i though it was supposed to be 3x = -15 also, simplify it by dividing both sides by 3 and you get x = -5

    • one year ago
  7. shamil98 Group Title
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    Correct, you cross out the y but you forgot to add the x. you get as twilight mentioned 3x = -15 from there you divide by 3 to both sides to get your x value of -5.

    • one year ago
  8. shamil98 Group Title
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    x + y = -7 -5 + y = -7 y = -2

    • one year ago
  9. shamil98 Group Title
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    (-5,-2) is your solution set to your system.

    • one year ago
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