Last edited by Archie Meade; December 30th 2009 at 01:21 AM.
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Now how about the problem
Originally Posted by Vuong Now how about the problem
-9x+15y=-30 Can't you solve it after all the different ways we showed you ?
Here is my hint : in the second equation, try to express in terms of , and substitute into the first equation to find . Then substitute the value of you found into any of the two equations to find .
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