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18 November, 07:26

Elimination

4x+5y=-15

-3x-2y=13

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Answers (1)
  1. 18 November, 07:50
    0
    Multiply the first equation by 3 and tge second by 4:

    12x+15y=-45

    -12x-8y=52

    then add the equations:

    0x+7y=7

    7y=7

    y=1

    so 4x+5 (1) = - 15

    4x+5=-15

    4x=-20

    x=-5
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