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20 November, 14:14

Solve the system of equations by substitution y=3x-10 3x+2y=16

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  1. 20 November, 14:20
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    y=3x-10

    3x+2y=16

    substitute y=3x-10 into 3x+2y=16

    3x+2y=16

    3x+2 (3x-10) = 16

    3x + 6x - 20 = 16

    9x = 36

    x = 4

    y=3x-10

    y=3 (4) - 10

    y=12-10

    y=2

    answer: x = 4 and y = 2 or (4,2)
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