Question 354066
1 -9/2 3/2 
9 8 2 
using -9r1+r2 (neg9 times row1 plus row 2) 
HOW IN GODS NAME DID THEY GET 
1 -9/2 3/2 
0 97/2 -23/2 
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-9*r1 --> -9  81/2  -27/2
Adding that to row 2 gives the result above
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PS  God isn't good at math.  Fact is, god's a moron.