document.write( "Question 823057: Solve by substitution.
\n" );
document.write( "X=12-y
\n" );
document.write( "6x-3y=9 \n" );
document.write( "
Algebra.Com's Answer #495235 by faceoff57(108)![]() ![]() You can put this solution on YOUR website! Solve by substitution. \n" ); document.write( "X=12-y \n" ); document.write( "6x-3y=9 \n" ); document.write( "6(12 - y) - 3y = 9 \n" ); document.write( "72 - 6y - 3y = 9 \n" ); document.write( "-9y = 9 - 72 \n" ); document.write( "-9y = -63 \n" ); document.write( "Y = 7 \n" ); document.write( "X = 12 - 7 \n" ); document.write( "X = 5 \n" ); document.write( "(5,7) \n" ); document.write( " |