need alot of help please math

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hello i need help with system of equations theres 3 only thank you
2x+3y-17
3x+y=31

2(x-3y)=24
y=3x-2

2(x+4)=24
x+y=17

  • need alot of help please math -

    2x+3y=17 I assume
    3x+y=31
    try elimination
    multiply the entire first equation by 3 to get 6x term
    multiply the entire second equation by 2 to get 6x term
    so:
    6x+9y = 51
    6x+2y = 62
    ----------- subtract
    7 y = -11
    y = -11/7
    then 2x = 17+33/7
    x = 152/14 = 76/7

    check
    3(76/7) -11/7 = 31, right

  • need alot of help please math -

    for the second one you already have y as a function of x so use substitution
    2(x-3y)=24 ---> x - 3y = 12
    y=(3x-2 )

    x - 3(3x-2) = 12
    -8 x + 6 = 12
    -8 x = 6
    x = -3/4 etc

  • need alot of help please math -

    are you sure whatb grade are you in

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