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6 November, 10:57

The equations were multiplied by constants and added together to determine that the value of x in the system of equations is - 20. One-fifth x minus one-third y = negative 1 Negative three-fourths x + one-third y = 12 What is the value of y? - 15 - 9 9 15

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  1. 6 November, 11:09
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    Step-by-step explanation:

    Given:

    1. 1/5x - 1/3y = - 1

    2. - 3/4x + 1/3y = 12

    Multiplying equation 1 by 15 and equation 2 by 12

    3. 3x - 5y = - 15

    4. - 9x + 4y = 144

    and then Solving both equations simultaneously, since x = - 20 as stated in the question and by confirmation,

    Using equation 3 or 4 to solve for y,

    3 (-20) - 5y = - 15

    -5y = 60 - 15

    y = 45/-5

    = - 9

    y = - 9
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