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13 December, 17:41

Solve the system algebraically. 3x - 2y - 1 = 0 y = 5x + 4 What is the solution? { (-9/7,-17/7) } { (9/7,17/7) } { (9/7,-17/7) }

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  1. 13 December, 18:47
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    3x - 2y - 1 = 0

    y = 5x + 4

    3x - 2 (5x + 4) - 1 = 0

    3x - 10x - 8 - 1 = 0

    -7x - 9 = 0

    -7x = 9

    x = - 9/7

    y = 5x + 4

    y = 5 (-9/7) + 4

    y = - 45/7 + 4

    y = - 45/7 + 28/7

    y = - 17/7

    solution is (-9/7, - 17/7)
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