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Posted by on Thursday, July 8, 2010 at 3:59am.

solve by elimiation
2r - 9s = -17
9r + 2s = 51

  • algebra - , Thursday, July 8, 2010 at 5:05am

    Multiply your first equation by -9 and the second equation by 2.
    -18r + 81s = 153
    18r + 4s = 102

    Next, add those two equations to eliminate the "r" variable.

    85s = 255

    Take it from there

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