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9 January, 14:19

Is x=3 the solution to the equation 8+3 (x-1) = 5x-1? How do you know

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Answers (2)
  1. 9 January, 14:20
    0
    To see if the solution to the equation is 3, you would have to plug 3 into the equation for the x's like this

    8 + 3 (3 - 1) = 5 (3) - 1

    8 + 9 - 3 = 15 - 1

    17 - 3 = 14

    14 = 14

    3 is the solution to the equation because 14 = 14.
  2. 9 January, 14:47
    0
    So we have;

    8 + 3 (x - 1) = 5x - 1

    Opening the brackets we get;

    8 + 3x - 3 = 5x - 1

    Taking all x terms to the left and all integers to right;

    8 - 3 + 1 = 5x - 3x

    9 - 3 = 2x

    6 = 2x

    This can also be arranged as;

    2x = 6

    x = 6 : 2 = 3

    So x = 3
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