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5 August, 13:14

X=7y+18

x=y+6

what is x?

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Answers (1)
  1. 5 August, 13:29
    0
    x = 7y + 18

    x = y + 6

    Use substitution

    y + 6 = 7y + 18

    Subtract y and 18

    6y = - 12

    y = - 2

    Insert - 2 into an equation.

    x = - 2 + 6

    x = 4
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