document.write( "Question 148900: Which of the following is a method for solving systems of two variables? \r
\n" ); document.write( "\n" ); document.write( "Substitution
\n" ); document.write( " Addition
\n" ); document.write( "Both of the above
\n" ); document.write( "None of the above \r
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\n" ); document.write( "\n" ); document.write( "I think it's both but not too sure
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Algebra.Com's Answer #109227 by nerdybill(7384)\"\" \"About 
You can put this solution on YOUR website!
You are correct.
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\n" ); document.write( "Substitution method described here:
\n" ); document.write( "http://www.purplemath.com/modules/systlin4.htm
\n" ); document.write( ".
\n" ); document.write( "Addition method described here:
\n" ); document.write( "http://www.purplemath.com/modules/systlin5.htm
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