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3 December, 17:39

6y+5x=8 x3y=-7 use substituion

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  1. 3 December, 20:07
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    Substitution:

    6y + 5x = 8

    x + 3y = - 7

    x = - 3y + 7

    6y + 5 (-3y + 7) = 8

    6y - 15y + 35 = 8

    -9y + 35 = 8

    -9y = - 27

    -y = - 3

    y = 3

    x = - 7 + 9

    x = 2

    y = 3

    x = 2
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