document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=569356>Question 569356</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ok, my son is has a problem in Algebra, he is in the 9th grade.  I can get the answer for him but he need to write it in algebra terms.  I never took algebra in school, so if I can tell you the question.  can you please tell me how to write it in algebra terms.\r<BR>\n" );
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document.write( "  Mike just got a phone bill for $27.60.  he is charge $.07 per minute for local calls and $.20 for long distance calls.  he talked for a total of 320 minutes.  How many long distance minutes did he use?\r<BR>\n" );
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document.write( "It sounds just like a typical story problem and easy to solve but feel bad that I can't put it in Algebra form\r<BR>\n" );
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document.write( "Thanks so much,\r<BR>\n" );
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document.write( "Until Next time,<BR>\n" );
document.write( "Sue </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #367314 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=367314\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mike just got a phone bill for $27.60. he is charged $.07 per minute for local calls and $.20 for long distance calls. he talked for a total of 320 minutes.<BR>\n" );
document.write( " How many long distance minutes did he use?<BR>\n" );
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document.write( "We need two equation to solve two unknowns, we are going to use substitution to solve this<BR>\n" );
document.write( "Let x = no. of local minutes<BR>\n" );
document.write( "Let y = no. of L.D minutes<BR>\n" );
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document.write( "x + y = 320; (total minutes equation<BR>\n" );
document.write( "x = (320-y); this form for substitution<BR>\n" );
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document.write( ".07x + .20y = 27.60; (total cost equation)<BR>\n" );
document.write( "Replace x with (320-y)<BR>\n" );
document.write( ".07(320-y) + .20y = 27.60<BR>\n" );
document.write( "22.4 - .07y + .20y = 27.60; (multiplied what's inside the brackets)<BR>\n" );
document.write( "-.07y +.20y = 27.60 - 22.4<BR>\n" );
document.write( ".13y = 5.20<BR>\n" );
document.write( "y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5.20%2F.13 ALIGN=MIDDLE  ALT=\"5.20%2F.13\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "y = 40 minutes of L.D calls which is answer they want<BR>\n" );
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document.write( "then in order to check our solution<BR>\n" );
document.write( "using x + y = 320<BR>\n" );
document.write( "x + 40 = 320<BR>\n" );
document.write( "x = 320 - 40<BR>\n" );
document.write( "x = 280 minutes of Local calls<BR>\n" );
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document.write( "Confirm this in the equation; .07x + .20y = 27.60<BR>\n" );
document.write( ".07(280) + .20(40) = <BR>\n" );
document.write( "19.60 + 8.00 = 27.60;  </SPAN>\n" );
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