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Mathematics 20 Online
OpenStudy (liv1234):

Can someone please help me?

OpenStudy (liv1234):

OpenStudy (liv1234):

@TheSmartOne

hartnn (hartnn):

lets try elimination method. Multiply the 1st equation by 3 Add the result with 2nd equation. can you try that?

OpenStudy (liv1234):

So, -3*3 and 2*3?

OpenStudy (liv1234):

I got (0,12), but I think that's wrong.

hartnn (hartnn):

What did you get when you multiply the entire equation -3x -2y = -12 by 3 ?

OpenStudy (liv1234):

-9x and 6y

OpenStudy (liv1234):

Oh and -36

hartnn (hartnn):

-9x -6y = -36 right? now add that with 2nd equation!

OpenStudy (liv1234):

So, -9+9 and 6+6 and then -36+-9?

hartnn (hartnn):

its -6y , right?? so -6+6

OpenStudy (liv1234):

0 and -9+9 is 0, so that means there would be no solutions right?

hartnn (hartnn):

0 + 0 = -36 - 9 0 = -45 that is NOT true. so that system does not have any solution! yes.

OpenStudy (liv1234):

Thank you! And I learned these systems in 9th grade, but forgot how to do them, so also thank you for showing me how to solve them again.(:

hartnn (hartnn):

welcome ^_^

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