document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=124728>Question 124728</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321279220/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Decide whether each is an expression or an equation. If it is an expression, simplify it. If it is an equation, solve it.\r<BR>\n" );
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document.write( "(a) 5x + 8 - 4x + 7          (b) -6y + 12 + 7y -5 =\r<BR>\n" );
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document.write( "(c) 5x +8 - 4x = 7           (d) -6y + 12 + 7y = -5 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #91443 by </B><A HREF=/tutors/aboutme.mpl?userid=dolly><B>dolly(163)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dolly><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=91443\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (a) 5x + 8 - 4x + 7<BR>\n" );
document.write( "This is an expression as it does not have an = sign\r<BR>\n" );
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document.write( "Adding the like terms, we get, 5x - 4x + 8 + 7<BR>\n" );
document.write( "                             = x + 15\r<BR>\n" );
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document.write( "(b) -6y + 12 + 7y -5 <BR>\n" );
document.write( "This is an expression as it does not have an = sign<BR>\n" );
document.write( "==>  (b) -6y + 12 + 7y -5 <BR>\n" );
document.write( "==>     - 6y + 7y + 12 - 5 <BR>\n" );
document.write( "==>          y + 7 <BR>\n" );
document.write( "==>          y +7 \r<BR>\n" );
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document.write( "c) 5x +8 - 4x = 7\r<BR>\n" );
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document.write( "This is an equation as = is present\r<BR>\n" );
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document.write( "==>   5x - 4x + 8 = 7<BR>\n" );
document.write( "==>    x + 8 = 7<BR>\n" );
document.write( "==>     x = 7 - 8 [adding -8 to both the sides]<BR>\n" );
document.write( "==>     x = - 1\r<BR>\n" );
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document.write( "d) -6y + 12 + 7y = -5<BR>\n" );
document.write( "This is an equation as = is present<BR>\n" );
document.write( "==>   y + 12 = -5<BR>\n" );
document.write( "==>   y = -5 - 12 [ adding -12 to both the sides]<BR>\n" );
document.write( "==>   y = - 17<BR>\n" );
document.write( "==>    y = - 17  </SPAN>\n" );
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