document.write( "Question 21088: A stamp collection consists of 5, 13, and 18 cent stamps. The number of 13 cent stamps is one less than twice the number of 5 cent stamps. The number of 18 cent stamps is five more than the number of 13 cent stamps. The total value of all the stamps is $2.60. Find the number of 13 cent stamps in the collection. \n" ); document.write( "
Algebra.Com's Answer #10870 by stanbon(75887)\"\" \"About 
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Let \"x\" be the number of 13cent stamps.
\n" ); document.write( "Then x = 2(# of 5cent stamps)-1.
\n" ); document.write( "So, the number of 5cent stamps =(x+1)/2
\n" ); document.write( "Number of 18cent stamps is x+5\r
\n" ); document.write( "\n" ); document.write( "The value of \"x\" 13cent stamps is 13x.
\n" ); document.write( "The value of the 5cent stamps is 5[(x+1)/2]
\n" ); document.write( "The value of the 18cent stamps is 18(x+5)\r
\n" ); document.write( "\n" ); document.write( "Equation:
\n" ); document.write( " Value of 13cent + Value or 13cent + Value of 18cent = 260cents
\n" ); document.write( " 13x + 5[(x+1)/2] + 18(x+5) = 260
\n" ); document.write( "Solve for \"x\" to get your answer.\r
\n" ); document.write( "\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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