document.write( "Question 1148269: What is the solution of the system? Use substitution.\r
\n" ); document.write( "\n" ); document.write( "x = y + 2
\n" ); document.write( "8y = 7x - 9
\n" ); document.write( "z = 6x - 4y
\n" ); document.write( "

Algebra.Com's Answer #769626 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
Use the first two equations to find x and y. Use these results to find z in the last equation. You see that first two equations do not contain z.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"8y=7%28y%2B2%29-9\"
\n" ); document.write( "\"8y=7y%2B14-9\"
\n" ); document.write( "\"y=14-9\"
\n" ); document.write( "\"highlight%28y=5%29\"
\n" ); document.write( "-
\n" ); document.write( "\"x=y%2B2\"
\n" ); document.write( "\"x=5%2B2\"
\n" ); document.write( "\"highlight%28x=7%29\"
\n" ); document.write( "-\r
\n" ); document.write( "\n" ); document.write( ".\r
\n" ); document.write( "\n" ); document.write( ".
\n" ); document.write( "
\n" );