math elimination method

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elimination method really confuses me.

solve by elimination method
5r -3s = 17
3r + 5s =17

A. solution is ______ (ordered pair, integer or fraction)
B. Infinitely many
C. No Solution

  • math elimination method -

    try to get either the x or the y coefficients to be alike
    in this case I will get the y's to have a 15 in front

    so multiply the first by 5 and the second by 3 to get

    25r - 15s = 85
    9r + 15s = 51

    add them
    34r = 136
    r = 136/34 = 4

    back in second, (or first)
    3(4) + 5s = 17

    12 + 5s = 17
    5s = 5
    s = 1

  • math elimination method -

    thank you so much, i was not even close

  • math elimination method -

    4x-3y=-4. 3x=2y-4

  • math elimination method -

    2r+3s=29,3r+2s=16

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