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26 September, 03:35

Solve the system below by the elimation

7x+2y=24

8x+2y=30

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Answers (1)
  1. 26 September, 05:24
    0
    x = 6

    y = - 9

    Step-by-step explanation:

    multiply first equation by - 1

    -1 * (7x + 2y) = 24 ➡ - 7x-2y = - 24

    now add this to the second equation

    -7x-2y + 8x + 2y = 30-24

    x = 6

    use thus value to find y

    8*6 + 2y = 30 ➡2y = 30-48

    y = - 9
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