document.write( "Question 851997: A trapezoid has a perimeter of 117 cm. The two shortest sides have the same length. The third side is 12 cm longer than one short side. The final side is 9 cm less than three times one short side. How long is each side of the trapezoid? \n" ); document.write( "
Algebra.Com's Answer #513057 by josgarithmetic(39620)\"\" \"About 
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x = length of each shortest side;
\n" ); document.write( "x+12 = another side;
\n" ); document.write( "-9+3x = the last side.\r
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\n" ); document.write( "\n" ); document.write( "Perimeter, \"2x%2B%28x%2B12%29%2B%283x-9%29=117\"
\n" ); document.write( "6x+3=117
\n" ); document.write( "6x=114
\n" ); document.write( "x=19\r
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\n" ); document.write( "\n" ); document.write( "Knowing x allows you to compute the other two sides.\r
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\n" ); document.write( "\n" ); document.write( "Note that a trapezoid has four sides. This is why I showed \"2x\" immediately in the perimeter equation, skipping the separate, \"x+x\".
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