Posted by Anonymous on Thursday, October 9, 2008 at 7:36pm.
multiply all terms in first equation by 4
+4a+8b = 4
-3a-8b = 1 now add
---------
1a+0b = 5 or a = 5
so use 5 for a in equation 1
5 + 2b = 1
2 b = -4
b = -2
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