document.write( "Question 1137705: Solve the simultaneous equations
\n" ); document.write( "a + b + c + d = 0
\n" ); document.write( "2a - 2b + 3c - 3d = 0
\n" ); document.write( "9a + 9b + 4c + 4d = - 1
\n" ); document.write( "-18a + 18b - 12c + 12d = 7
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Algebra.Com's Answer #755574 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
There are online solvers for up to 10 by 10 matrices.
\n" ); document.write( "Maybe more now.
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\n" ); document.write( "If you just want the answer, use one of them.
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