document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=68645>Question 68645</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve for I for this equation: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3I1-4I2=17+and+I1%2B3I2=-3+ ALIGN=MIDDLE  ALT=\"+3I1-4I2=17+and+I1%2B3I2=-3+\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Note the I1 (has a number 1 at the bottom right hand corner and the I2 has the number 2 on the right hand corner.)<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #48923 by </B><A HREF=/tutors/aboutme.mpl?userid=rmromero><B>rmromero(383)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rmromero><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=48923\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3I%5B1%5D-4I%5B2%5D=17+and+I%5B1%5D%2B3I%5B2%5D=-3+ ALIGN=MIDDLE  ALT=\"+3I%5B1%5D-4I%5B2%5D=17+and+I%5B1%5D%2B3I%5B2%5D=-3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Let us represent other variables.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+I%5B1%5D ALIGN=MIDDLE  ALT=\"x+=+I%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+I%5B2%5D ALIGN=MIDDLE  ALT=\"y+=+I%5B2%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Rewrite the equations<BR>\n" );
document.write( "3x-4y=17 <BR>\n" );
document.write( "x+3y=-3<BR>\n" );
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document.write( "We can solve for the variables using elimination method.<BR>\n" );
document.write( "Multiply -3 to x+3y=-3<BR>\n" );
document.write( "3x - 4y = 17<BR>\n" );
document.write( "-3x - 9y = 9<BR>\n" );
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document.write( "Add the two equations<BR>\n" );
document.write( "-13y = 26<BR>\n" );
document.write( "<br>Divide -13 both sides<BR>\n" );
document.write( "y = -2  <<<<<<<<<<<<<<<<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+I%5B2%5D ALIGN=MIDDLE  ALT=\"y+=+I%5B2%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Substitute 2 for y in either equation. Solve for x.<BR>\n" );
document.write( "x+3y=-3, y = 2<BR>\n" );
document.write( "x + 3(-2)= -3<BR>\n" );
document.write( "x - 6 = -3<BR>\n" );
document.write( "x = 3  <<<<<<<<<<<<<< <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+I%5B1%5D ALIGN=MIDDLE  ALT=\"x+=+I%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<br> Checking: \r<BR>\n" );
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document.write( "3x-4y=17 , x = 3, y = -2<BR>\n" );
document.write( "3(3) - 4(-2) = 17<BR>\n" );
document.write( "9 + 8 = 17<BR>\n" );
document.write( "17 = 17 ----------->> True<BR>\n" );
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document.write( "x+3y=-3, x = 3, y = -2<BR>\n" );
document.write( "3 + 3(-2) = -3<BR>\n" );
document.write( "3 -6 = -3<BR>\n" );
document.write( "-3 = -3 --------->> True\r<BR>\n" );
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