document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=279154>Question 279154</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The price of blue socks is twice the price of black socks. If John buys 20 pairs of black socks and 30 pairs of blue socks he pays $120. How much does one pair of blue socks cost ?\r<BR>\n" );
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document.write( "(A) $1.50 (B) $3.00 (C) $4.50 (D) $1.00 (E) none of these </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #203009 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=203009\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The price of blue socks is twice the price of black socks. If John buys 20 pairs of black socks and 30 pairs of blue socks he pays $120. How much does one pair of blue socks cost ?\r<BR>\n" );
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document.write( "(A) $1.50 (B) $3.00 (C) $4.50 (D) $1.00 (E) none of these\r<BR>\n" );
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document.write( "let cost of black socks be x\r<BR>\n" );
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document.write( "So blue socks will be 2x\r<BR>\n" );
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document.write( "20x+30*2x=120\r<BR>\n" );
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document.write( "20x+60x=120\r<BR>\n" );
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document.write( "80x=120\r<BR>\n" );
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document.write( "x=120/80<BR>\n" );
document.write( "$1.5 black socks \r<BR>\n" );
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document.write( "$3 will be the cost of blue socks </SPAN>\n" );
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