document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=77827>Question 77827</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I also have another question, here it is. It is on the substitution method. Here it is 3b-2a=4 and b/2-2a/3=1 </SPAN>\n" );
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document.write( "3b - 2a = 4\r<BR>\n" );
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document.write( "==> 3b = 4 + 2a [adding 2a to both the sides]\r<BR>\n" );
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document.write( "==> b = (4+2a)/3\r<BR>\n" );
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document.write( "Plugging in this value in the second equation,\r<BR>\n" );
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document.write( "b/2 - 2a/3 = 1\r<BR>\n" );
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document.write( "==> (4+2a)/3*2 - 2a/3 = 1\r<BR>\n" );
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document.write( "==> 2(2+a)/6  -  2a/3 = 1 [factoring 4+2a]\r<BR>\n" );
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document.write( "==> 2+a/3 - 2a/3 = 1  [cancelling 2 in the first term]\r<BR>\n" );
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document.write( "==> 2 + a - 2a = 3 [multiply by 3]\r<BR>\n" );
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document.write( "==> 2 - a = 3\r<BR>\n" );
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document.write( "==> -a = 3 - 2\r<BR>\n" );
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document.write( "==> -a = 1\r<BR>\n" );
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document.write( "==> a = -1\r<BR>\n" );
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document.write( "so b = 4+2(-1)/3\r<BR>\n" );
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document.write( "==> b = 2/3\r<BR>\n" );
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document.write( "Thus a = -1 amd b= 2/3\r<BR>\n" );
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document.write( "Good luck </SPAN>\n" );
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