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math urgent!

posted by on .

find the values of x and y that solve te following system of equations

3x+2y=-22
5x-9y=25

  • math urgent! - ,

    first one times 9 ---> 27x + 18y = - 198
    2nd one times 2 ---> 10x - 18y = 50

    add them : 37x = -148
    x = -4

    I will let you finish it.

  • math urgent! - ,

    3x+2y=-22 (1)
    5x-9y=25 (2)
    Multiply (1) by 9 and (2) by 2 to get the y's to cancel
    27x+18y=-198 (3)
    10x-18y=50 (4)
    Add (3) and (4) together
    37x=-148
    Divide both sides by 37
    x=-4
    Substitute that in either original equation (1) or (2) to solve for y. Check to make sure it works for the other equation, as well.

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