document.write( "Question 363852: Model Cars, Inc. makes red cars, white cars, and blue cars. THe profit on a blue car is $10 more than the profit on a white car, and the profit on a red car is $7 less than the profit on a white car. If the profit on 2 red cars is $2 less than the profit on one blue car, what is the profit on a blue car? \n" ); document.write( "
Algebra.Com's Answer #259505 by amoresroy(361)\"\" \"About 
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Model Cars, Inc. makes red cars, white cars, and blue cars. THe profit on a blue car is $10 more than the profit on a white car, and the profit on a red car is $7 less than the profit on a white car. If the profit on 2 red cars is $2 less than the profit on one blue car, what is the profit on a blue car?\r
\n" ); document.write( "\n" ); document.write( "Let b = profit on a blue car
\n" ); document.write( " w = profit on a white car
\n" ); document.write( " r = profit on a red car\r
\n" ); document.write( "\n" ); document.write( " b = w + 10 (1)
\n" ); document.write( " r = w - 7 (2)
\n" ); document.write( " 2r = b -2
\n" ); document.write( " 2r-b= -2 (3)
\n" ); document.write( "
\n" ); document.write( "Subtract eq. (2) by 2q. (1)
\n" ); document.write( " r - b = 0 - 7 - 10
\n" ); document.write( " r - b = -17 (4)
\n" ); document.write( "Subtract eq. (3) by eq. (4)
\n" ); document.write( " r - 0 = -2 - (-17)
\n" ); document.write( " r = 15
\n" ); document.write( "in eq (2)
\n" ); document.write( " r = w - 7
\n" ); document.write( " 15 = w - 7
\n" ); document.write( " w = 22\r
\n" ); document.write( "\n" ); document.write( "in eq (1)
\n" ); document.write( " b = w + 10
\n" ); document.write( " b = 22 + 10
\n" ); document.write( " b = 32\r
\n" ); document.write( "\n" ); document.write( "The profit on a blue car is $32 \n" ); document.write( "
\n" );