document.write( "Question 169468: The cost of a shirt plus a sales tax of $0.87 equals $16.86. Find the cost of the shirt. \n" ); document.write( "

Algebra.Com's Answer #125208 by jojo14344(1513) $\"\"$ $\"About$

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$\"Cost%2BSalesTax=TotalCost\"$ , working eqn
\n" ); document.write( "given ----> $\"system%28Cost=Cost%2CTax=0.87%2CTotalCost=16.86%29\"$
\n" ); document.write( "Subst. Working eqn,
\n" ); document.write( " $\"Cost%2B0.87=16.86\"$
\n" ); document.write( " $\"Cost=16.86-0.87\"$
\n" ); document.write( " $\"highlight%28Cost=15.99%29\"$ , Answer
\n" ); document.write( "Check the percentage of Tax:
\n" ); document.write( "Let $\"x=percent\"$
\n" ); document.write( " $\"Cost%2B%28x%29Cost=TotalCost\"$
\n" ); document.write( " $\"15.99%2B%28x%2915.99=16.86\"$
\n" ); document.write( " $\"15.99%281%2Bx%29=16.86\"$ ---> $\"cross%2815.99%29%281%2Bx%29%2Fcross%2815.99%29=16.86%2F15.99\"$
\n" ); document.write( " $\"%281%2Bx%29=1.0544\"$
\n" ); document.write( " $\"x=1.0544-1=0.0544%2A100\"$ ---------> x=5.44% (Tax)
\n" ); document.write( ".
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo \n" ); document.write( "

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