document.write( "Question 697603: Six times the difference of two positive numbers exceeds 4 by 21. Three times their sum equals 8 times the smaller number. Find the numbers. \n" ); document.write( "
Algebra.Com's Answer #430162 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Six times the difference of two positive numbers \"x\" and \"y\" ( let \"y\" be smaller number) exceeds \"4\" by \"21\". \r
\n" ); document.write( "\n" ); document.write( "\"6%28x-y%29%2B21=4\".....1\r
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\n" ); document.write( "\n" ); document.write( "Three times their sum equals \"8\" times the smaller number\r
\n" ); document.write( "\n" ); document.write( "\"3%28x%2By%29=8y\".......2\r
\n" ); document.write( "\n" ); document.write( "now we have system to solve:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"6%28x-y%29%2B21=4\".....1
\n" ); document.write( "\"3%28x%2By%29=8y\".......2
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\n" ); document.write( "\n" ); document.write( "\"6x-6y=4-21\".....1.....solve for \"x\"\r
\n" ); document.write( "\n" ); document.write( "\"6x=6y-17\"\r
\n" ); document.write( "\n" ); document.write( "\"x=6y%2F6-17%2F6\"\r
\n" ); document.write( "\n" ); document.write( "\"x=y-2.833\"....plug in 2\r
\n" ); document.write( "\n" ); document.write( "\"3%28y-2.833%2By%29=8y\".......2....solve for \"y\"\r
\n" ); document.write( "\n" ); document.write( "\"3y-8.499%2B3y=8y\"\r
\n" ); document.write( "\n" ); document.write( "\"6y-8.499=8y\"\r
\n" ); document.write( "\n" ); document.write( "\"-8.499=8y-6y\"\r
\n" ); document.write( "\n" ); document.write( "\"-8.499=2y\"\r
\n" ); document.write( "\n" ); document.write( "\"-4.2495=y\"\r
\n" ); document.write( "\n" ); document.write( "now find \"x\"\r
\n" ); document.write( "\n" ); document.write( "\"x=-4.2495-2.833\"\r
\n" ); document.write( "\n" ); document.write( "\"x=-7.0825\"\r
\n" ); document.write( "\n" ); document.write( "check:\r
\n" ); document.write( "\n" ); document.write( "\"6%28-7.0825-%28-4.2495%29%29%2B21=4\".....1\r
\n" ); document.write( "\n" ); document.write( "\"6%28-7.0825%2B4.2495%29%2B21=4\"\r
\n" ); document.write( "\n" ); document.write( "\"6%28-2.833%29%2B21=4\"\r
\n" ); document.write( "\n" ); document.write( "\"-16.998%2B21=4\"\r
\n" ); document.write( "\n" ); document.write( "\"4.002=4\"\r
\n" ); document.write( "\n" ); document.write( "\"4=4\"\r
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