Solve each system of linear or non-linear equations. Show all work!! 3x – 4y = 13 2x + y = 5

Question

Solve each system of linear or non-linear equations. Show all work!!
3x – 4y = 13
2x + y = 5

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Hồng Cúc 3 months 2021-08-06T09:53:25+00:00 1 Answers 2 views 0

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    2021-08-06T09:55:02+00:00

    Answer: See below

    Explanation:

    3x – 4y = 13 (1)
    2x + y = 5 (2)
    ——————
    3x – 4y = 13
    4(2x + y = 5) (2) times 4
    ——————-
    3x – 4y = 13
    8x + 4y = 20
    ——————-
    11x = 33
    x = 33/11
    x = 3

    Plug x = 3 in (2):

    2(3) + y = 5
    6 + y = 5
    y = 5-6
    y = -1

    Thus, x = 3 and y = -1

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