document.write( "Question 1163596: Subscript notation is frequently used for working with larger systems of equations. Use a matrix approach to solve the system. Express the solutions as 4-tuples of the form
\n" ); document.write( "(x1, x2, x3, x4).\r
\n" ); document.write( "\n" ); document.write( "x1 − 3x2 − 2x3 + x4 = −2
\n" ); document.write( "−2x1 + 7x2 + x3 − 2x4 = −3
\n" ); document.write( "3x1 − 7x2 − 3x3 + 3x4 = −2
\n" ); document.write( "5x1 + x2 + 4x3 − 2x4 = 16 \n" ); document.write( "
Algebra.Com's Answer #787725 by ikleyn(52787)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "Go to the site https://matrix.reshish.com.\r
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\n" ); document.write( "\n" ); document.write( "Find there free of charge online solver for matrix equations.\r
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\n" ); document.write( "\n" ); document.write( "Choose an appropriate method.\r
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\n" ); document.write( "\n" ); document.write( "Input your extended matrix into the solver.\r
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\n" ); document.write( "\n" ); document.write( "You will get the solution in seconds with full explanations.\r
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