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13 October, 22:27

Y=9x-2

3x-2y=7

what is the value of x of the given system of equation

A) - 3.8

B) 3.8

C) - 0.2

D) 0.2

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Answers (1)
  1. 13 October, 23:14
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    Y = 9x - 2

    3x - 2y = 7

    so sub in 9x - 2 for y in the 2nd equation and solve for x

    3x - 2 (9x - 2) = 7

    3x - 18x + 4 = 7

    3x - 18x = 7 - 4

    -15x = 3

    x = - 3/15

    x = - 1/5 or - 0.2 <===
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