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27 June, 06:15

W many solutions does this linear system have? y = 2x - 5 - 8x - 4y = - 20

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  1. 27 June, 07:21
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    Using substitution

    -8x-4 (2x-5) = - 20

    -8x-8x+20=-20

    -16x+20=-20

    -16x=-40

    x=2.5

    Plug x into one of the original equations.

    y=2 (2.5) - 5

    y=5-5

    y=0

    Final answer: 1 solution (2.5, 0)
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