document.write( "Question 1145834: Elimination using matrices\r
\n" ); document.write( "\n" ); document.write( "3p+2r=11
\n" ); document.write( "q-7r=4
\n" ); document.write( "q-6q=1\r
\n" ); document.write( "\n" ); document.write( "I set up my matrix to this\r
\n" ); document.write( "\n" ); document.write( "3 2 11
\n" ); document.write( "1 -7 4
\n" ); document.write( "1 -6 1\r
\n" ); document.write( "\n" ); document.write( "But I am using the photomath app to help me through the steps but they have the matrix set up as\r
\n" ); document.write( "\n" ); document.write( "3 0 2 11
\n" ); document.write( "0 1 -7 4
\n" ); document.write( "1 -6 0 1\r
\n" ); document.write( "\n" ); document.write( "So right now I am not sure if mine is incorrect.
\n" ); document.write( "I have been reading about matrices and the goals but still not sure what I am supposed to be doing. Am I supposed to get a make a number a 0 on each row to be able to solve the equation? \n" ); document.write( "
Algebra.Com's Answer #767085 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
You have to account for p, q and r in each equation.
\n" ); document.write( "If one doesn't appear then you need a zero.
\n" ); document.write( "Photomath is correct
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