document.write( "Question 45384: triangle has sides 3x + 7 and 4x - 9 and 5x- 7 find the expression that represents the perimeter \n" ); document.write( "
Algebra.Com's Answer #30133 by rapaljer(4671)\"\" \"About 
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Add up the three sides:
\n" ); document.write( "3x+ 7 + 4x -9 + 5x - 7\r
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\n" ); document.write( "\n" ); document.write( "Combine like terms:
\n" ); document.write( "12x -9\r
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\n" ); document.write( "\n" ); document.write( "R^2 at SCC
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