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21 March, 16:25

What is the solution of the system?

4x-y=-3

6x-y=-8

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Answers (1)
  1. 21 March, 16:47
    0
    6x - y = - 8

    y = 6x + 8 - not plug this in the first equation

    4x - y = - 3

    4x - (6x + 8) = - 3

    4x - 6x - 8 = - 3

    -2x = - 3+8

    -2x = 5

    x = 5 / (-2)

    x = - 5/2

    Now we can solve for y.

    As we said before, y = 6x + 8

    y = 6 * (-5/2) + 8

    y = - 15 + 8

    y = - 7

    {x, y} = {-5/2,-7} is the solution to the system
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