document.write( "Question 1188700: Let $a$, $b$, $c$, $d$, and $e$ be positive integers. The sum of the four numbers on each of the five segments connecting \"points\" of the star is 28. What is the value of the sum $a + b + c + d + e$?
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Algebra.Com's Answer #819850 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "From the description of the problem and the figure... \n" ); document.write( "a+1+4+c=28; a+c=23 [1] \n" ); document.write( "b+4+2+d=28; b+d=22 [2] \n" ); document.write( "c+2+5+e=28; c+e=21 [3] \n" ); document.write( "d+5+3+a=28; d+a=20 [4] \n" ); document.write( "e+3+1+b=28; e+b=24 [5] \n" ); document.write( "Adding [1] through [5]... \n" ); document.write( "2(a+b+c+d+e)=110 \n" ); document.write( "a+b+c+d+e=55 [6] \n" ); document.write( "ANSWER: a+b+c+d+e=55 \n" ); document.write( "Note we can determine the values of a, b, c, d, and e individually, even though the problem doesn't ask us to. \n" ); document.write( "Combining [1], [2], and [6] gives us e=10; \n" ); document.write( "Then using the figure gives us b=14, d=8, a=12, c=11. \n" ); document.write( " \n" ); document.write( " |