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5 November, 00:24

Solve using double substitution

y=x-7

y=-2x+8

+5
Answers (1)
  1. 5 November, 01:39
    0
    (5, - 2)

    Step-by-step explanation:

    x - 7 = - 2x + 8

    add 2x to both sides

    x - 7 + 2x = - 2x + 8 + 2x

    3x - 7 = 8

    Add 7 to both sides

    3x - 7 + 7 = 8 + 7

    3x = 15

    3x = 15

    x = 5

    y = 5 - 7

    y = - 2

    Solution (5, - 2)
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