document.write( "Question 342491: the sum of three numbers is 75.the second number is 5 more than 4 times the first, and the third is 2 times the first.find the second number \n" ); document.write( "

Algebra.Com's Answer #245162 by Fombitz(32388) $\"\"$ $\"About$

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Let A,B and C be the numbers.
\n" ); document.write( "1. $\"A%2BB%2BC=75\"$
\n" ); document.write( " $\"B=5%2B4A\"$
\n" ); document.write( " $\"C=2A\"$
\n" ); document.write( "Substitute into eq. 1,
\n" ); document.write( " $\"A%2B5%2B4A%2B2A=75\"$
\n" ); document.write( " $\"7A%2B5=75\"$
\n" ); document.write( " $\"7A=70\"$
\n" ); document.write( " $\"highlight%28+A=10%29\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"B=5%2B4%2810%29\"$
\n" ); document.write( " $\"highlight%28+B=45%29\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"C=2%2810%29\"$
\n" ); document.write( " $\"highlight%28+C=20%29\"$ \n" ); document.write( "

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