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Posted by on Saturday, November 7, 2009 at 10:10pm.

0.3x-0.2y=4,0.5x+0.5y=-15/9 solve

  • Algebra - , Saturday, November 7, 2009 at 10:59pm

    Multiply the first by 10
    3x - 2y = 40
    Multiply the second by 6
    3x + 3y = -10

    Now subtract them :
    5y = -50
    y = -10
    then x = 20/3

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