document.write( "Question 747338: Solve by substitution. \r
\n" ); document.write( "\n" ); document.write( "X+3Y=15
\n" ); document.write( "2x-3y=3
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Algebra.Com's Answer #454834 by lynnlo(4176)\"\" \"About 
You can put this solution on YOUR website!
x=-12,,,,,,,,,,y=9 \n" ); document.write( "
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