Posted by yolanda on Tuesday, July 1, 2008 at 9:19pm.
Personally, I like gaussian reduction as a choice method, becausing my TI83 does it very quickly and accurately.
But for your methods, graphing on a graphing calc is fast. In school, often variables are assigned whole number values, which make elimination easy, but in real life (engineering), few answers are even rational numbers, much less whole numbers.
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