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26 December, 22:33

What is 4x 3y=19,6x-5y=-57?

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  1. 26 December, 22:56
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    4x+3y=19 and 6x-5y=-57

    eliminate

    multiply first equation by - 6 and 2nd by 4

    and add them

    -24x-18y=-114

    24x-20y=-228 +

    0x-38y=-342

    -38y=-342

    divide both sides by - 38

    y=9

    sub back

    4x+3y=19

    4x+3 (9) = 19

    4x+27=19

    minus 27 both sides

    4x=-8

    divide 4

    x=-2

    (x, y)

    (-2,9)
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