document.write( "Question 106811: x+y+z=30000 \r
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document.write( ".02x+.03y+.06z=1110 \r
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document.write( ".02x+150=.03y : solve for x,y, and z.\r
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document.write( "The problem im having with this problem is the \"z\" variable. It is only on 2 of the 3 equations. Ive been trying to solve by using the method of elimination, but I cant seem to isolate the variables. thank you.\r
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Algebra.Com's Answer #77732 by HyperBrain(694)![]() ![]() ![]() You can put this solution on YOUR website! Elimination method is perfect for this system!\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "First let's eliminate x! To do that, let's use \n" ); document.write( "\n" ); document.write( "Let's multiply \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now, let's multiply \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "It's elimination time!\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Line up the equations\r \n" ); document.write( "\n" ); document.write( "_____________________________2x+3y+6z=111000 \n" ); document.write( "_____________________________2x+2y+2z=60000\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If you subtract \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "you'll get \r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Solving \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now, let's eliminate y! we'll do that by using \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Solving \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Multiplying this by 100,\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Multiplying \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "it's elimination time!\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Line up the equations!\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "______________________________2x+3y+6z=111000 \n" ); document.write( "______________________________2x-3y =-15000\r \n" ); document.write( "\n" ); document.write( "If you add these, you'll get:\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Solving this,\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Substituting \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Yahoo! we found the value of z at last!\r \n" ); document.write( "\n" ); document.write( "But wait, there's more!\r \n" ); document.write( "\n" ); document.write( "Remember that \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Also, \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "therefore, x=13000, y=11000, and z=10000.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Power up, \n" ); document.write( "HyperBrain! \n" ); document.write( " |