Yahoo Answers: Answers and Comments for Determine whether the given system is solvable. Thank you!? [Mathematics]
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From angel
enUS
Tue, 09 Feb 2010 16:05:43 +0000
3
Yahoo Answers: Answers and Comments for Determine whether the given system is solvable. Thank you!? [Mathematics]
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From Anonymous: The coefficient matrix for the first one is:
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https://answers.yahoo.com/question/index?qid=20100209160543AAAmUAs
Tue, 09 Feb 2010 16:11:53 +0000
The coefficient matrix for the first one is:
 1 2 3 
 1 1 0 
 2 3 1 
Now, if this is solvable, Det(A) ≠ 0. However, by entering this matrix in my calculator, I get this has a determinant of 6. So this is solvable.
For the second, it is:
 1 2 3 
 4 5 6 
 7 8 9 
This has a determinant of 0. So it is not solvable.
I hope this helps!

From kennie: exchange 5 for x and eight for y into each and...
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https://answers.yahoo.com/question/index?qid=20100209160543AAAmUAs
Mon, 12 Dec 2016 10:19:25 +0000
exchange 5 for x and eight for y into each and every equation and spot if it "tests" for the two: 3(5)  2(8) = a million 15  sixteen = a million a million = a million genuine > It tests!! 9(8) = 4(5) + fifty 3 seventy two = 20 + fifty 3 seventy two = seventy 3 fake > It would not examine. subsequently, (5, 8) isn't a answer of the device.