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10 November, 00:57

Which system of equations has only one solution?

4x+2y = 8

-4x-2y=3

-5x+y=6

5x-y=-6

-3x+4y = 2

3x-4y=0

2x+4y = 6

3x-47-9

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Answers (1)
  1. 10 November, 01:03
    0
    fourth group of equation has one only one solution

    Step-by-step explanation:

    when we solve these

    4x+2y = 8

    -4x-2y=3

    we get infinite solution

    -5x+y=6

    5x-y=-6

    we get infinite solution

    -3x+4y = 2

    3x-4y=0

    but when we solve forth equation we get

    2x+4y = 6

    3x-4y=-9

    5x=15

    x=3

    only one solution
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