document.write( "Question 908961: Hi\r
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document.write( "Pl Can you show me how to solve this problem. I am not sure if the category is correct.. I just chose one.
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document.write( "5x−4y+3z=15
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document.write( "6x+2y+9z=13
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document.write( "7x+6y−6z=6\r
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document.write( "My email add: playatthepark@gmail.com\r
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document.write( "I am a mom. \n" );
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Algebra.Com's Answer #551432 by lwsshak3(11628)![]() ![]() ![]() You can put this solution on YOUR website! 5x−4y+3z=15 \n" ); document.write( "6x+2y+9z=13 \n" ); document.write( "7x+6y−6z=6 \n" ); document.write( "*** \n" ); document.write( "15x−12y+9z=45(mult. 1st eq. by 3) \n" ); document.write( "6x+2y+9z=13(2nd eq.) \n" ); document.write( "subtract:(eliminating z) \n" ); document.write( "9x-14y=32(4th eq.) \n" ); document.write( ".. \n" ); document.write( "10x−8y+6z=30(mult. 1st eq by 2) \n" ); document.write( "7x+6y−6z=6(3rd eq) \n" ); document.write( "add:(eliminating z) \n" ); document.write( "17x-2y=36(5th eq.) \n" ); document.write( ".. \n" ); document.write( "9x-14y=32(4th eq.) \n" ); document.write( "119x-14y=252(mult. 5th eq. by 7) \n" ); document.write( "subtract:(eliminating y) \n" ); document.write( "-110x=-220 \n" ); document.write( "x=2 \n" ); document.write( "14y=9x-32=-14(4th eq.) \n" ); document.write( "y=-1 \n" ); document.write( "3z=15-5x+4y=15-10-4=1(1st eq.) \n" ); document.write( "3z=1 \n" ); document.write( "z=1/3 \n" ); document.write( "Check:x=2, y=-1, z=1/3 \n" ); document.write( "5x−4y+3z=10+4+1=15 \n" ); document.write( "6x+2y+9z=12-2+3=13 \n" ); document.write( "7x+6y−6z=14-6-2=6 \n" ); document.write( "check ok \n" ); document.write( " |