I have a system of equations:
4x+5y=6
6x-7y=-20
When i used the matrix in the calculator i get (-1,-2). However when using substitution i get (-5.66,-2), and when i do substitution on the other equation i get (4,-2). I know i should probably go with the calculator but i need to know how to do it by hand.

Question

I have a system of equations:
4x+5y=6
6x-7y=-20
When i used the matrix in the calculator i get (-1,-2). However when using substitution i get (-5.66,-2), and when i do substitution on the other equation i get (4,-2). I know i should probably go with the calculator but i need to know how to do it by hand.

ashercp · Answer

Also plugging in any of those answers doesn't complete the system of equations for me.

studygurl14 · Answer

Can you show me what you did step by step? Maybe you made a mistake.

ashercp · Answer

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