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7 April, 17:30

X+y=8. X-y=2 elimination problem

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  1. 7 April, 20:02
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    X+Y=8 "" X=8-Y

    now we can substitute X with 8-Y in the second equation, which was X-Y=2

    X-Y=2 "" (8-Y) - Y=2 "" 8-2Y=2 "" 2Y=8-2 "" Y=6/2 "" Y=3

    since X=8-Y, and Y=3, so X=8-3=5

    X=5 and Y=3
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