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algebra 1

posted by on .

Use elimination to solve the the system of equations given by 10x-4y=-20
and 10x-5y=35.
I can't figure this one out. Whenever I check my work, it is incorrect.

  • algebra 1 - ,

    when I subtract the last equation from the first, I get

    y = -55
    sub that back into the first
    10x -4(-55) = -20
    10x + 220 = -20
    10x = -240
    x = -24

    (those values verify in both equations)

  • algebra 1 - ,

    Thank you! You were a lot of help!

  • algebra 1 - ,

    -6x+5y=1 6x+4y=-10

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