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Math

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1.5x+4y=8
x+y=7
Please help me solve this system of equation and show your work.

  • Math - ,

    I would multiply the 2nd equation by 4, then subtract ...
    5x+4y=8
    4x+4y=28
    x = -20

    sub into 2nd
    -20 + y = 7
    y = 27

    x = -20 , y = 27

  • Math - ,

    5x + 4y = 8
    x + y = 7

    Find x :
    x = 7 - y

    5(7 - y) + 4y = 8
    35 - 5y + 4y = 8
    -y = 8 - 35
    y = 27

    x = 7 + 27
    x = 34

    y = 27
    x = 34

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