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15 February, 15:58

How to solve in substitution

Y=2x-10

2y=x-8

+3
Answers (2)
  1. 15 February, 17:39
    0
    2 (2x-10) = x-8

    4x-20=x-8

    3x=12

    x=4
  2. 15 February, 19:31
    0
    2*y = x - 8, y = 2x - 10

    2 * (2x-10) = x - 8

    2*2x - 2*10 = x - 8

    4x - 20 = x - 8 | + 20

    4x = x + 20 - 8 = x + 12 | - x

    4x - x = 12

    3x = 12

    x = 12:3

    x = 4

    y = 2*4 - 10

    y = 8 - 10

    y = - 2
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