х+у= 20 3х – 3 = 30 Which of x and y satisfy this system of equations?

Question

х+у= 20
3х – 3 = 30

Which of x and y satisfy this system of equations?

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Ngọc Diệp 3 years 2021-09-03T01:12:31+00:00 1 Answers 5 views 0

Answers ( )

  1. hongcuc2
    0
    2021-09-03T01:14:14+00:00
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    Answer:

    x = 11, y = 9

    Step-by-step explanation:

    Given the 2 equations

    x + y = 20 → (1)

    3x – 3 = 30 → (2)

    In (2) add 3 to both sides

    3x = 33 ( divide both sides by 3 )

    x = 11

    Substitute x = 11 into (1)

    11 + y = 20 ( subtract 11 from both sides )

    y = 9

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