document.write( "Question 932837: Hi, I am not sure how to set the equation up I guess, the answer I keep getting is 1518, answer key says it is wrong. The sales tax on a car that sold for $13,000 is $897. At the same rate, how much higher is the sales tax on a car that sells for $22,000?
\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #566427 by ptfile(81)\"\" \"About 
You can put this solution on YOUR website!
Let $13,000 = base amount of the first car
\n" ); document.write( " $22,000 = base amount of the second car
\n" ); document.write( " $897 = Principal amount of the first car
\n" ); document.write( "
\n" ); document.write( "The sales tax on a car that sold for $13,000 is $897.
\n" ); document.write( "Principal = (rate)(base)\r
\n" ); document.write( "\n" ); document.write( " 897 = (r)(13,000)
\n" ); document.write( " 897/13,000 = r
\n" ); document.write( " .069 or 6.9% = r\r
\n" ); document.write( "\n" ); document.write( "At the same rate, how much higher is the sales tax on a car that sells for $22,000?
\n" ); document.write( "Principal = (rate)(base)
\n" ); document.write( " P = (22,000)(.069)
\n" ); document.write( " p = 1518\r
\n" ); document.write( "\n" ); document.write( "Principal of second car - Principal of first car = difference of sales tax
\n" ); document.write( "1518 - 897 = $621\r
\n" ); document.write( "\n" ); document.write( "The sales tax on the second car is $621 higher than the first car.
\n" ); document.write( "
\n" );