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5 October, 14:03

Solve y = 2x - 4 by the substitution method. 7x - 5y = 14

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Answers (2)
  1. 5 October, 15:47
    0
    Substitute y = 2x - 4 into 7x - 5y = 14.

    > 7x - 5 (2x - 4) = 14

    > 7x - 10x + 20 = 14

    > - 3x = - 6

    > x = 2

    Now sub x = 2 back into y = 2x - 4 to find what y equals.

    > y = 2 (2) - 4

    > y = 4 - 4

    > y = 0

    Therefore, x = 2 and y = 0.
  2. 5 October, 17:34
    0
    Substitution method is one of the way in determining the value of a variable by substituting the variable by the value of an equation and simplifying its value. So in step by step way, 7x-5 (2x-4) is the equation result in substituting the Y variable. By simplifying the value of x is 3.34 and Y is 2.68
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