document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1106460>Question 1106460</A>: <I><SPAN STYLE=\"word-break: break-all;\"> given:4-7x=25<BR>\n" );
document.write( "prove:x=-3<BR>\n" );
document.write( "(note: that's all I have figured out so far)<BR>\n" );
document.write( "statement              reason<BR>\n" );
document.write( "a.4-7x=25            a.given<BR>\n" );
document.write( "b.-4+4-7x=-4+25      b.sub. prop. of =<BR>\n" );
document.write( "c.0-7x=21            c.<BR>\n" );
document.write( "d.-7x/-7=21/-7       d. division property of equality<BR>\n" );
document.write( "e.1x=21/-7           e.<BR>\n" );
document.write( "f.x=-3               f.substitution    </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #721435 by </B><A HREF=/tutors/aboutme.mpl?userid=math_helper><B>math_helper(2461)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_helper><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=math_helper><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=721435\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "I've actually never seen an algebraic expression worked out like a Geometric 'proof' before.   Here's how I'd do it:\r<BR>\n" );
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document.write( "given:  4-7x = 25   <BR>\n" );
document.write( "If we solve this for  x that \"proves\" the value, no?<BR>\n" );
document.write( "—\r<BR>\n" );
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document.write( "4-7x -4 = 25 - 4       ( equal quantities minus 4 are still equal quantities )<BR>\n" );
document.write( "-7x = 21                     ( simplified, both sides )<BR>\n" );
document.write( "-7x/-7 = 21/-7           ( equal quantities divided by -7 are still equal quantities )<BR>\n" );
document.write( "   x = -3                     ( simplified, both sides )\r<BR>\n" );
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document.write( "Done.\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );