Posted by Terri on Tuesday, February 24, 2009 at 10:34pm.
Thanks for your help with the solving of the three equations! Yes, it was a typo. I just finished solving it a long way, solving for the 1st 2 equations then the 2nd and 3rd and plugging in variables...etc. etc. Your way gave the same answer, but quicker, does your way always work???

algebra attn Reiny  Reiny, Tuesday, February 24, 2009 at 10:40pm
if there is a solution, it works
the method I used is "elimination"
you have to look for the variable with the "easiest" number combination
It was luck that in the second set of equations we had 5x in both, that made it easy to simply subtract them.
Had the coefficients been different you would have to multiply by suitable numbers to get them the same.

algebra attn Reiny  Terri, Tuesday, February 24, 2009 at 10:44pm
thanks for the clarification!!
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