Posted by **Marie** on Saturday, February 27, 2010 at 12:57pm.

using echelon method

4x-2y=9

20x-10y=27

pls help with problem. Once I get 24x -2y 36 I'm confused after that.

- Math -
**Reiny**, Saturday, February 27, 2010 at 1:44pm
Somebody expects you to solve a 2 by 2 system using matrices with echelon reduced form ??

That's like going to the corner store to buy milk in an 18 wheeler tractor-trailer.

Furthermore the system has no solutions, since if you multiply the first by 5, you get

20x - 10y = 45

now subtract the two to get

0 = 18

CONTRADICTION, so no solution.

- Math -
**Marie**, Saturday, February 27, 2010 at 2:03pm
Thanks Reiny

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