document.write( "Question 623270: I have no idea how to do these, but its solving linear systems.\r
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document.write( "1) 35x+y=20
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document.write( " 1.5x-0.1y=18\r
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document.write( "2) x+(1/3y)=-2
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document.write( " -8x-(2/3y)=4\r
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document.write( "Would you mind showing the work? as stated before, I have no idea how to do these, so anything to help me understand would be much appreciated. Thank you!\r
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Algebra.Com's Answer #392024 by MathTherapy(10552)![]() ![]() You can put this solution on YOUR website! I have no idea how to do these, but its solving linear systems.\r \n" ); document.write( "\n" ); document.write( "1) 35x+y=20 \n" ); document.write( " 1.5x-0.1y=18\r \n" ); document.write( "\n" ); document.write( "2) x+(1/3y)=-2 \n" ); document.write( " -8x-(2/3y)=4\r \n" ); document.write( "\n" ); document.write( "Would you mind showing the work? as stated before, I have no idea how to do these, so anything to help me understand would be much appreciated. Thank you!\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "No. 1 \n" ); document.write( "It's always best to rid the equation of decimals\r \n" ); document.write( "\n" ); document.write( "35x + y = 20 ---- eq (i) \n" ); document.write( "1.5x - 0.1y = 18 ---- eq (ii)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "15x - y = 180 -- Multiplying eq (ii) by 10 to rid it of its decimals --- eq (ii) \n" ); document.write( "35x + y = 20 --- eq (i) \n" ); document.write( "50x = 200 ----- Adding eqs (ii) & (i)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x = \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "35(4) + y = 20 ------ Substituting 4 for x in eq (i) \n" ); document.write( "140 + y = 20\r \n" ); document.write( "\n" ); document.write( "y = \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "No. 2 \n" ); document.write( "It can be very ugly working with fractions, so the best thing to do is get rid of them\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "6x + 2y = - 12 ----- Multiplying eq (i) by 6 ----- eq (iii) \n" ); document.write( "- 24x - 2y = 12 ----- Multiplying eq (ii) by 3 ----- eq (iv) \n" ); document.write( "- 18x = 0 ----- Adding eqs (iii) and (iv)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x = \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "0 + 2y = - 12 ----- Substituting 0 for x in eq (iii) \n" ); document.write( "2y = - 12\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "y = \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com \n" ); document.write( " |