document.write( "Question 161198: Solve by the elimination method.\r
\n" ); document.write( "\n" ); document.write( "9x-9y=27
\n" ); document.write( "7y-3x= -11\r
\n" ); document.write( "\n" ); document.write( "What is the solution of the system?
\n" ); document.write( "

Algebra.Com's Answer #118827 by jojo14344(1513)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "\"9x-9y=27\" --------------> eqn 1
\n" ); document.write( "\"7y-3x=-11\" ------------> eqn 2
\n" ); document.write( "Multiply eqn 2 by \"highlight%283%29\":
\n" ); document.write( "\"7y-3x=-11\"-------> \"21y-9x=-33\" -----> eqn 3
\n" ); document.write( "Add eqn 1 & eqn 3:
\n" ); document.write( "\"12y=-6\" ----> \"system%289x-9y=27%2C21y-9x=-33%29\", eliminates \"9x\"
\n" ); document.write( "Continuing,
\n" ); document.write( "\"cross%2812%29y%2Fcross%2812%29=-6%2F12=-1%2F2\" divide 12 to isolate y
\n" ); document.write( "\"y=-1%2F2\"
\n" ); document.write( "via eqn 1:
\n" ); document.write( "\"9x-9%28-1%2F2%29=27\"
\n" ); document.write( "\"9x%2B9%2F2=27\"
\n" ); document.write( "\"9x=27-9%2F2=%2854-9%29%2F2\" get LCD of left term
\n" ); document.write( "\"18x=45\", cross multiply
\n" ); document.write( "\"cross%2818%29x%2Fcross%2818%29=cross%2845%292.5%2Fcross%2818%29\"
\n" ); document.write( "\"x=2.5\"
\n" ); document.write( "(2.5,-0.5) ANSWER
\n" ); document.write( "Check via eqn 2:
\n" ); document.write( "\"7%2A-1.5-3%2A2.5=-11\"
\n" ); document.write( "\"-3.5-7.5=-11\"
\n" ); document.write( "\"-11=-11\"
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo
\n" ); document.write( "
\n" ); document.write( "
\n" );