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18 March, 16:58

What is the x-coordinate of the solution for the system of equations?

{y-x=9

{10+2x=-2

Enter your answer in the box.

x =

+3
Answers (1)
  1. 18 March, 17:32
    0
    Y - x = 9

    10y + 2x = - 2

    Using the first equation

    Y = 9 + x

    Substitute to the 2nd equation

    10 (9 + x) + 2x = - 2

    90 + 10x + 2x = - 2

    12x = - 92

    X = - 23 / 3
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