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I am trying to invert the matrix in the picture. I had done mistakes 3 times. And I heard someone in Khanacademy were saying "let computer do the hard tasks". I was trying to find better Matrix solution software online, but I am also willing to install software if it solves my problem.

I had found Matrix Calc. You know what when I had put the above matrix there then that webpage was completely unresponsive..

I found another site called SymbolLab. But the site isn't completely better for matrix. Only addition subtraction is helpful. But not inverse. Sometimes I get Illegal input in that site also.

I had found another one also: https://matrix.reshish.com/matrixMethod.php. In this page I just can deal with simple matrix (just talking about 3x3 matrix for now). But I can do simple inverse matrix in notepad I don't need them to solve simple matrix.

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