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28 April, 06:08

Solve by using elimination 3x+y=27 - 3x+4y=-42

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  1. 28 April, 07:40
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    Hello:

    3x+y=27 ... (1)

    -3x+4y=-42 ... (2)

    (1) + (2) : 5y = - 15

    y = - 3

    subsct in : (1) 3x - 3 = 27

    3x = 30

    x=10
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