math help

please show me how to do this I am very lost I keep getting a wierd answer like 16/9 something like that please help me

Solve the system by addition. 4x+6y = 9,8x-3y = -7

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  1. 4x +6y = 9
    8x -3y = -7
    Double both sides of the last equation:
    16x - 6y = -14
    Now add the first and third equations above and watch the y terms cancel.
    20x = -5, so
    x = -1/4
    Now use that x in the first equation to get y.
    -1 +6y = 9
    6y = 10
    y = 5/3

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