document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=818945>Question 818945</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Some students held a car wash. They charged $3 to wash each car. The students made a profit of $330 after they spent $15 on supplies for the cash wash. How many cars did they wash?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #492865 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=492865\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> profit equation:<BR>\n" );
document.write( "p = r - c<BR>\n" );
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document.write( "r = 3n<BR>\n" );
document.write( "c = 15<BR>\n" );
document.write( "p = 3n - 15<BR>\n" );
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document.write( "330 = 3n - 15<BR>\n" );
document.write( "3n = 345<BR>\n" );
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document.write( "n = 115 cars<BR>\n" );
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document.write( "Solve and graph linear equations:<BR>\n" );
document.write( "https://sooeet.com/math/linear-equation-solver.php<BR>\n" );
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document.write( "Solve quadratic equations, quadratic formula:<BR>\n" );
document.write( "https://sooeet.com/math/quadratic-formula-solver.php<BR>\n" );
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document.write( "Calculate and graph the linear regression of any data set:<BR>\n" );
document.write( "https://sooeet.com/math/linear-regression.php </SPAN>\n" );
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