document.write( "Question 148971: A sailboat sail in the shape of an isosceles triangle has a base that is 9 feet longer that either of the equal sides. If the perimeter of the sail is 21 feet, then what is the length of the base of the sail? \n" ); document.write( "
Algebra.Com's Answer #109303 by stanbon(75887)\"\" \"About 
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A sailboat sail in the shape of an isosceles triangle has a base that is 9 feet longer that either of the equal sides. If the perimeter of the sail is 21 feet, then what is the length of the base of the sail?
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\n" ); document.write( "Let the equal side length be \"x\" ft.
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\n" ); document.write( "EQUATIO:
\n" ); document.write( "x +x + x + 9 = 21
\n" ); document.write( "3x = 12
\n" ); document.write( "x = 4 ft (length of one of the equal sides)
\n" ); document.write( "x+9 = 13 (length of the base)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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