document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1121921>Question 1121921</A>: <I><SPAN STYLE=\"word-break: break-all;\"> xy=nza\r<BR>\n" );
document.write( "\n" );
document.write( "if n,z,a are constant what happens to the value of x if y is halved </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #737947 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=737947\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "Two numbers x and y are multiplied to get a constant, nza.<br><BR>\n" );
document.write( "If one of the two numbers is halved, in order to keep the constant product the other number needs to be doubled.<br><BR>\n" );
document.write( "\"Doubling and halving\" is a common practice in mental arithmetic.  For example, to multiply 12 times 35 you can double the 35 to 70 and halve the 12 to 6 and get 6 times 70.  With the trailing 0 in one of the numbers the multiplication is easy:<br><BR>\n" );
document.write( "12*35 = 6*70 = 420 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );