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7 December, 11:37

Solve this system of equations

{2x + y = 11

{5x - y = 10

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Answers (1)
  1. 7 December, 13:02
    0
    solution: (3, 5)

    Step-by-step explanation:

    Solve this system of equations

    {2x + y = 11

    {5x - y = 10

    add the equations to use elimination method.

    2x + 5x + y - y = 11 + 10;

    7x = 21

    x = 21/7 = 3

    x = 3

    y = 11 - 2x = 11 - 2*3 = 11 - 6 = 5
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