document.write( "Question 916125: Solve the following system.\r
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document.write( "x+(1/3y)+z=13
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document.write( "(1/2x)-y+(1/3z)=-2
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document.write( "x+(1/2y)-(1/3z)=2 \n" );
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Algebra.Com's Answer #555914 by mananth(16946)![]() ![]() You can put this solution on YOUR website! x+(1/3y)+z=13 \n" ); document.write( "(1/2x)-y+(1/3z)=-2 \n" ); document.write( "x+(1/2y)-(1/3z)=2\r \n" ); document.write( "\n" ); document.write( "Take LCM and simplify the equations to eliminate the denominators\r \n" ); document.write( "\n" ); document.write( "3 x + 1 y + 3 z = 39 -------------- 1 \n" ); document.write( "3 x + -6 y 2 z = -12 -------------- 2 \n" ); document.write( "6 x + 3 y + -2 z = 12 -------------- 3 \n" ); document.write( " \n" ); document.write( "consider equation 1 &2 Eliminate y \n" ); document.write( "Multiply 1 by 6 -5 \n" ); document.write( "Multiply 2 by 1 4 \n" ); document.write( "we get \n" ); document.write( "18 x + 6 y + 18 z = 234 \n" ); document.write( "3 x + -6 y + 2 z = -12 \n" ); document.write( "Add the two \n" ); document.write( "21 x + 0 y + 20 z = 222 ------------- 4 \n" ); document.write( "consider equation 2 & 3 Eliminate y \n" ); document.write( "Multiply 2 by 1 \n" ); document.write( "Multiply 3 by 2 \n" ); document.write( "we get \n" ); document.write( "3 x + -6 y + 2 z = -12 \n" ); document.write( "12 x + 6 y + -4 z = 24 \n" ); document.write( "Add the two \n" ); document.write( "15 x + 0 y + -2 z = 12 -------------5 5 \n" ); document.write( "Consider (4) & (5) Eliminate x \n" ); document.write( "Multiply 4 by -15 \n" ); document.write( "Multiply (5) by 21 \n" ); document.write( "we get \n" ); document.write( "-315 x + -300 z = -3330 \n" ); document.write( "315 x + -42 z = 252 \n" ); document.write( "Add the two \n" ); document.write( "0 x + -342 z = -3078 \n" ); document.write( "/ -342 \n" ); document.write( "z = 9 \n" ); document.write( "15 x + -2 z= 12 \n" ); document.write( "15 x + -18 = 12 \n" ); document.write( " x = 2 \n" ); document.write( "Plug x & z in eq (1) \n" ); document.write( "3 x + 1 y + 3 z = 39 -------------- 1 \n" ); document.write( " 6 + 1 y + 27 = 39 \n" ); document.write( " 1 y = 6 \n" ); document.write( " y = 6 \n" ); document.write( " x= 2 y= 6 z= 9 \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |