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15 July, 18:33

Solve 7x - 2y = - 3

14x + y = 14

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  1. 15 July, 20:49
    0
    7x - 2y = - 3

    14x + y = 14

    14x - 14x + y = 14-14x

    Y = 14 - 14x

    7x - 2y = - 3

    7x - 2 (14 - 14x) = - 3

    7x - 28 + 28x = - 3

    7x + 28x - 28 = - 3

    35x - 28 = - 3

    35x - 28 + 28 = - 3 + 28

    35x = 25

    35x/35 = 25/35

    X = 25/35 = 5/7.

    Y = 14 - 14x

    Y = 14 - 14 (5/7)

    Y = 14 - 10

    Y = 4.

    The solution P (5/7,4).
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