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Posted by on Sunday, March 15, 2009 at 10:02pm.

solve and comparison:

a)4x-9y+4
6x+15y=-13

im so lost!!!!!

  • 9th grade - , Sunday, March 15, 2009 at 10:05pm

    srry
    it's

    solve and comparison:

    a)4x-9y=4
    6x+15y=-13

    im so lost!!!!!

  • 9th grade - , Sunday, March 15, 2009 at 10:29pm

    Help me is NOT the name of this post. Math or Algebra.

    Sra

  • Algebra - , Monday, March 16, 2009 at 10:38am

    4x-9y=4
    6x+15y=-13

    To solve, first isolate x (or y) in one of the equations.

    4x = 4 + 9y
    x = 1 + 2.25y

    Substitute the right hand portion for x in the second equation.

    6(1 + 2.25y) + 15y = -13

    Solve for y. Put that value into the first equation to solve for x. To check, put both values into the second equation.

    I hope this helps. Thanks for asking.

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