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Math Help - Solve by substitution method

  1. #1
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    Solve by substitution method

    I have a system of equations that illustrates two different floor plans (60 total) for sale, four times more of the second are available than the first (x= the first floor plan, y=the second:
    x+y=60
    y=x(4)

    I need help solving how many of each are available via substitution. I assumed that I could substitute y for x (y+1)in the first equation but that is not checking. I appreciate help with this!
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  2. #2
    MHF Contributor
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    x + y =60
    y = 4x

    substite "y=4x" in the first equation
    x + 4x = 60
    5x=60
    x=12
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