document.write( "Question 151777: Can someone please help me solve this linear system in three variables?\r
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document.write( "x-3y=11
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document.write( "5y+z=4
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document.write( "-x+z=2
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document.write( "{(?,?,?)} \n" );
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Algebra.Com's Answer #111611 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! adding 1st and 3rd eqns __ z-3y=13 __ adding 3y __ z=3y+13\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "substituting into 2nd eqn __ 5y+(3y+13)=4 __ subtracting 13 __ 8y=-9 __ y=-9/8\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "substituting into 1st eqn __ x-3(-9/8)=11 __ subtracting 27/8 __ x=61/8\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "substituting into 3rd eqn __ -(61/8)+z=2 __ adding 61/8 __ z=77/8 \n" ); document.write( " |