document.write( "Question 1210391: The sum of two numbers is 21.five times the first number added to 2 times the second number is 66.find the numbers \n" ); document.write( "
Algebra.Com's Answer #852175 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "let’s the numbers be \"x\" and \"y\"\r
\n" ); document.write( "\n" ); document.write( "if the sum of two numbers is \"21\", we have\r
\n" ); document.write( "\n" ); document.write( "\"x%2By=21\".......solve for \"x\"\r
\n" ); document.write( "\n" ); document.write( "\"x=21-y\"...........eq.1\r
\n" ); document.write( "\n" ); document.write( "if five times the first number added to \"2\" times the second number is \"66\". we have\r
\n" ); document.write( "\n" ); document.write( "\"5x%2B2y=66\".......solve for \"x\"\r
\n" ); document.write( "\n" ); document.write( "\"5x=66-2y\"\r
\n" ); document.write( "\n" ); document.write( "\"x=66%2F5-2y%2F5\"............eq.2\r
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\n" ); document.write( "\n" ); document.write( "from eq.1 and eq.2 we have\r
\n" ); document.write( "\n" ); document.write( "\"21-y=66%2F5-2y%2F5\".........both sides multiply by \"5\"\r
\n" ); document.write( "\n" ); document.write( "\"105-5y=66-2y\"\r
\n" ); document.write( "\n" ); document.write( "\"105-66=5y-2y\"\r
\n" ); document.write( "\n" ); document.write( "\"39=3y\"\r
\n" ); document.write( "\n" ); document.write( "\"39%2F3=y\"\r
\n" ); document.write( "\n" ); document.write( "\"y=13\"\r
\n" ); document.write( "\n" ); document.write( "go to\r
\n" ); document.write( "\n" ); document.write( "\"x=21-y\"...........eq.1, substitute \"y\"\r
\n" ); document.write( "\n" ); document.write( "\"x=21-13\"\r
\n" ); document.write( "\n" ); document.write( "\"x=8\"\r
\n" ); document.write( "\n" ); document.write( "so. your numbers are \"8\" and \"13\"\r
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