document.write( "Question 330733: A triangle has a perimeter of 84 inches. its shortest side measures 9 inches shorter than its middle side,and its longest side measures 6inches longer than its middle side. find the lengths of the triangle three sides \n" ); document.write( "
Algebra.Com's Answer #237115 by dewasmaharaja(5)\"\" \"About 
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Let three sides of the triangle be
\n" ); document.write( "l for long
\n" ); document.write( "m for middle
\n" ); document.write( "s for short\r
\n" ); document.write( "\n" ); document.write( "Then,
\n" ); document.write( "l + m + s = 84 ...(a)
\n" ); document.write( "s = m - 9 ...(b)
\n" ); document.write( "l = m + 6 ...(c)\r
\n" ); document.write( "\n" ); document.write( "Substituting equation (b) and (c) in (a),\r
\n" ); document.write( "\n" ); document.write( "m - 9 + m + m + 6 = 84\r
\n" ); document.write( "\n" ); document.write( "3m = 87
\n" ); document.write( "Therefore, m = 87/3 = 29\r
\n" ); document.write( "\n" ); document.write( "From (b), s = 29 - 9 = 20
\n" ); document.write( "From (c), l = 29 + 6 = 35
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