document.write( "Question 415260: what is the length and width of a triangular sign if the length exceeds the width by 15 inches and the perimeter is 158 inches? \n" ); document.write( "
Algebra.Com's Answer #291175 by htmentor(1343)\"\" \"About 
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Since the perimeter is the sum of all the sides, 2l + w = 158 (1)
\n" ); document.write( "Also l - w = 15 (2)
\n" ); document.write( "Solving for l in (2) and substituting in (1) we have 2*(w+15) + w = 158
\n" ); document.write( "This reduces to 3w + 30 = 158, or w = 128/3 = 42 2/3
\n" ); document.write( "Putting this into (2) we have l - 42 2/3 = 15 or l = 57 2/3.
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