document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=936396>Question 936396</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A jar contains 50 coins all either 2 cents or 5 cents. The total value of the coins is $1.87. How many 2 cents coins are there? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #569842 by </B><A HREF=/tutors/aboutme.mpl?userid=srinivas.g><B>srinivas.g(540)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=srinivas.g><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=srinivas.g><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=569842\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let  x be the no of 2 cents coins and y be the no of 5 cents coins<BR>\n" );
document.write( "  total no of coins  =50<BR>\n" );
document.write( "  x+y= 50 -------------eq(1)\r<BR>\n" );
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document.write( "The total value of the coins is $1.87<BR>\n" );
document.write( "  x*0.02+y*0.05 = 1.87 .........eq(2)<BR>\n" );
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document.write( " <TR><TD  ALIGN=MIDDLE>Solved by <A  rel=nofollow HREF=http://wiki.algebra.com/index.php/Tutoring_-_pluggable_solvers>pluggable</A> solver: <A  rel=nofollow HREF=linear_substitution.solver>SOLVE linear system by SUBSTITUTION</A></TD></TR>\n" );
document.write( "<TR><TD  ALIGN=LEFT>Solve:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+system%28+%0D%0A++++1%5Cx+%2B+1%5Cy+=+50%2C%0D%0A++++0.02%5Cx+%2B+0.05%5Cy+=+1.87+%29%0D%0A++ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >We'll use substitution. After moving 1*y to the right, we get:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2Ax+=+50+-+1%2Ay ALIGN=MIDDLE  ALT=\"1%2Ax+=+50+-+1%2Ay\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+50%2F1+-+1%2Ay%2F1 ALIGN=MIDDLE  ALT=\"x+=+50%2F1+-+1%2Ay%2F1\"   DISABLED_style= \"max-width:90%; height:auto;\" >. Substitute that<BR>\n" );
document.write( "  into another equation:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.02%2A%2850%2F1+-+1%2Ay%2F1%29+%2B+0.05%5Cy+=+1.87 ALIGN=MIDDLE  ALT=\"0.02%2A%2850%2F1+-+1%2Ay%2F1%29+%2B+0.05%5Cy+=+1.87\"   DISABLED_style= \"max-width:90%; height:auto;\" > and simplify: So, we know that y=29. Since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+50%2F1+-+1%2Ay%2F1 ALIGN=MIDDLE  ALT=\"x+=+50%2F1+-+1%2Ay%2F1\"   DISABLED_style= \"max-width:90%; height:auto;\" >, x=21.<BR>\n" );
document.write( "  <BR>\n" );
document.write( "  Answer: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28+x=21%2C+y=29+%29 ALIGN=MIDDLE  ALT=\"system%28+x=21%2C+y=29+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
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document.write( "  no of 2 cents coins  =21<BR>\n" );
document.write( " no of 5 cents coins  =29 </SPAN>\n" );
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