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Math Help - simultaneous equations

  1. #1
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    simultaneous equations

    could you please help me solve this equation

     x-4y=-2
     y=2x-3
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  2. #2
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    Quote Originally Posted by johnsy123 View Post
    could you please help me solve this equation

     x-4y=-2
     y=2x-3
    Substitute the value of y into the first equation.

    x - 4(2x - 3) = -2

    x - 8x + 12 = -2

    -7x + 12 = -2

    -7x = -14

    x = 2.


    Back substitute to find y.

    y = 2x - 3

    y = 2\times 2 - 3

    y = 4 - 3

    y = 1.
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