document.write( "Question 73181: Solve by either elimination, substitution or Crammer's Rule.
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document.write( "I am not sure how to do this problem since there is more than one # on the right side of the =. Please help.\r
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document.write( "y=10-2z-x
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document.write( "4x-y=2
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document.write( "-5+5z=4x+3y \n" );
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Algebra.Com's Answer #52430 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Rearrange the equations in the form ax+by+cz = d \n" ); document.write( "y=10-2z-x \n" ); document.write( "4x-y=2 \n" ); document.write( "-5+5z=4x+3y \n" ); document.write( "------------- \n" ); document.write( "x+y+2z = 10 \n" ); document.write( "4x-y+0z = 2 \n" ); document.write( "4x+3y-5z=-5 \n" ); document.write( "---------------- \n" ); document.write( "The \"coefficient\" matrix has determinant (5+24+0)-(-8+0-20)=57 \n" ); document.write( "The \"x\" matrix determinant is 62 \n" ); document.write( "The \"y\" matrix determinant is 134 \n" ); document.write( "The \"z\" matrix determinant is 187 \n" ); document.write( "--------- \n" ); document.write( "x=62/57 \n" ); document.write( "y=134/57 \n" ); document.write( "z=187/57 \n" ); document.write( "----------- \n" ); document.write( "Using matrix multiplication (A^-1B) I get the same answer. \n" ); document.write( "Cheer, \n" ); document.write( "Stan H. \n" ); document.write( " |