document.write( "Question 430525: Three times the larger of two numbers is equal to four times the smaller. The sum of the numbers is 21. Find the numbers. \n" ); document.write( "
Algebra.Com's Answer #299018 by jorel1380(3719)\"\" \"About 
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Let X and Y be our numbers. Then:\r
\n" ); document.write( "\n" ); document.write( "3X=4Y and X+Y=21.\r
\n" ); document.write( "\n" ); document.write( "3X+3Y=63\r
\n" ); document.write( "\n" ); document.write( "We substitute for 3X:\r
\n" ); document.write( "\n" ); document.write( "4Y+3Y=63
\n" ); document.write( "7Y=63
\n" ); document.write( "Y=9
\n" ); document.write( "X=21-Y=21-9=12.
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