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19 October, 18:29

5x - 10y = 15

3x + 7y = 31

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Answers (1)
  1. 19 October, 19:34
    0
    x=6.385 and y=1.692

    Step-by-step explanation:

    solve the simultaneous equations as show;

    7 (5x - 10y = 15)

    10 (3x + 7y = 31)

    35x-70y=105

    30x+70y=310

    Eliminate y; 65x=415

    solve for x=415/65 = 6.385

    solve for y⇒where 5x-10y=15

    (5*6.385) - 10y=15

    31.92-10y=15

    16.92=10y

    y=1.692
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