document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=457451>Question 457451</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If 7 more than 3x a number is added to a diffrence of 5x a number and 10 the resust is 3o find the number.   Hi I am trying to help my daugghter and I need help. #2 how much of a 50 % acid Solution should be combined with 10% acid solution to make 200 ounces of a 40% solution.  #3 twice the diffece of a number and eight is equal to three times the sum of the number and 3. Find the number. If you can show the work so I will be able to learn as well as show my child. Thank you. marjorygregory@gmail.com </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #313857 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=313857\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If 7 more than 3 x a number is added to a difference of 5 x a number and 10 the result is 3o.  Find the number. <BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "3x + 7 + 5x + 10 = 30<BR>\n" );
document.write( "8x + 17 = 30<BR>\n" );
document.write( "8x = 13<BR>\n" );
document.write( "x = 13/8<BR>\n" );
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document.write( "#2 how much of a 50% acid Solution should be combined with 10% acid solution to make 200 ounces of a 40% solution. <BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "acid + acid = acid<BR>\n" );
document.write( "0.50x + 0.10(200-x) = 0.40*200<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "50x + 10*200-10x = 40*200<BR>\n" );
document.write( "4ox = 30*200<BR>\n" );
document.write( "x = 30*5<BR>\n" );
document.write( "x = 150 ounces (amt. of 50% solution needed)<BR>\n" );
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document.write( "200-x = 50 ounces (amt of 10% solution needed<BR>\n" );
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document.write( "#3 twice the difference of a number and eight is equal to three times the sum of the number and 3. Find the number. <BR>\n" );
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document.write( "2(x-8) = 3(x+3)<BR>\n" );
document.write( "2x-16 = 3x+9<BR>\n" );
document.write( "x = -25<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "If you can show the work so I will be able to learn as well as show my child.  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );