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solve by the substitution method

3x + 6y = 27
-2x + y = 12

what is the solution of the system..(type an ordered pair, or N if there is no solution)

  • math -

    3x+6y=27
    y=2x+12

    Then 3x+6(2x+12)=27
    3x+12x+72=27
    15x=45
    x=9

  • math -

    i get that part but it tells me im wrong that they want it something like this..(3,4)i don't get that..

  • math -

    Geepers, if x is 3, calculate y from either equation and put it in that form (3,?)

    Note that La Tarial made a typo, x=3, not 9

  • math -

    Actually, it is wrong, La Trial made another error.

    3x+12x+72=27
    15x=-45
    x=-15
    so y = 2(-15)+12

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