document.write( "Question 82113: My directions are to solve the system by substitution. I don't know what I did wrong, but when I went to recheck my work I did not come up with the right answer could someone please re-work this problem and tell me what I did wrong.
\n" ); document.write( "3x+3y=9
\n" ); document.write( "y=2x-12\r
\n" ); document.write( "\n" ); document.write( "My work
\n" ); document.write( "3x+3(2x-12)=9 y=2(50
\n" ); document.write( "3x+6x-36=9 =10-12
\n" ); document.write( "9x/9=45/9 = -2
\n" ); document.write( "x=5
\n" ); document.write( "(5,-2)\r
\n" ); document.write( "\n" ); document.write( "To Check
\n" ); document.write( "5+ -2=7
\n" ); document.write( "7+ -2=9 \n" ); document.write( "

Algebra.Com's Answer #58822 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
3x+3y=9
\n" ); document.write( "y=2x-12
\n" ); document.write( "------------
\n" ); document.write( "You have x=5, y=-2
\n" ); document.write( "Check:
\n" ); document.write( "3(5)+3(-2)=9
\n" ); document.write( "15-6=9
\n" ); document.write( "9=9
\n" ); document.write( "-------
\n" ); document.write( "or
\n" ); document.write( "-2=2(5)-12
\n" ); document.write( "-2=10-12
\n" ); document.write( "-2=-2
\n" ); document.write( "============
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

\n" );