document.write( "Question 122768: Solve the system by substitution.
\n" ); document.write( " x + y = 12
\n" ); document.write( " y = 2x
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Algebra.Com's Answer #90113 by checkley71(8403)\"\" \"About 
You can put this solution on YOUR website!
Y=2X
\n" ); document.write( "X+2X=12
\n" ); document.write( "3X=12
\n" ); document.write( "X=12/3
\n" ); document.write( "X=4 ANSWER.
\n" ); document.write( "Y=2*4=8 ANSWER.
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