document.write( "Question 213996: Please help me solve the substituation x+y=12 and x-y=-4. I can't figure out how to solve these \n" ); document.write( "
Algebra.Com's Answer #161638 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
There's more than one method. The easiest method for this pair is elimination and substitution.
\n" ); document.write( "x+y=12
\n" ); document.write( "x-y=-4
\n" ); document.write( "--------- Add the 2 equations
\n" ); document.write( "2x = 8
\n" ); document.write( "x = 4
\n" ); document.write( "------
\n" ); document.write( "Sub for x into either eqn
\n" ); document.write( "x+y = 12
\n" ); document.write( "4+y = 12
\n" ); document.write( "y = 8
\n" ); document.write( "-----
\n" ); document.write( "
\n" );