document.write( "Question 1091509: I sold a smoothie for $420.
\n" ); document.write( "a) if I made a profit of 20% what was the cost price?
\n" ); document.write( "b) if I incurred a loss of 20%, what was his cost price?
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Algebra.Com's Answer #705916 by Boreal(15235)\"\" \"About 
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cost price is x
\n" ); document.write( "made 20%
\n" ); document.write( "1.20x is the sale price=$420
\n" ); document.write( "divide both sides by 1.20
\n" ); document.write( "x=$350, and 20% profit is $70.
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\n" ); document.write( "cost was x
\n" ); document.write( "loss of 20% means sold for 0.80x
\n" ); document.write( "$420/0.8=$525.
\n" ); document.write( "20% of $525 is $105 and that is the sale price, the decrease over the original amount. Notice that the differences are not the same.
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