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23 October, 15:46

For elimination method the 1st question is Solve the system of equations - 6x-5y=-12 and - 8x-5y=4 by combining the equations.

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  1. 23 October, 19:30
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    Eliminate y's

    times first equation by - 1 and add to 2nd

    6x+5y=12

    -8x-5y=4 +

    -2x+0y=16

    -2x=16

    divide both sides by - 2

    x=-8

    sub back

    6x+5y=12

    6 (-8) + 5y=12

    -48+5y=12

    add 48 to oth sides

    5y=60

    divide both sides by 5

    y=12

    x=-8

    y=12

    (-8,12)
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