document.write( "Question 492028: The selling price of a calculator is $115. If the mark-up is 25% of the dealer's cost, what is the dealer's cost? \n" ); document.write( "
Algebra.Com's Answer #334895 by nerdybill(7384)\"\" \"About 
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The selling price of a calculator is $115. If the mark-up is 25% of the dealer's cost, what is the dealer's cost?
\n" ); document.write( "Let d = dealer's cost
\n" ); document.write( "then
\n" ); document.write( "d + .25d = 115
\n" ); document.write( "d(1+.15) = 115
\n" ); document.write( "d(1.15) = 115
\n" ); document.write( "d = $100
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