document.write( "Question 94539: How can I solve this by elimination method?
\n" ); document.write( "x-y=8
\n" ); document.write( "6+3y=-2x
\n" ); document.write( "And can I solve this in substitution method and get the answer x=18/5 and y=10/5 \n" ); document.write( "

Algebra.Com's Answer #68873 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
How can I solve this by elimination method?
\n" ); document.write( "1st: x-y=8
\n" ); document.write( "2nd: 6+3y=-2x
\n" ); document.write( "------------
\n" ); document.write( "Multiply thru 1st by 3 to get:
\n" ); document.write( "3rd: 3x-3y=24
\n" ); document.write( "2nd: 2x+3y=-6
\n" ); document.write( "------------
\n" ); document.write( "Add 2nd and 3rd to get:
\n" ); document.write( "5x = 18
\n" ); document.write( "x = 18/5
\n" ); document.write( "-------------
\n" ); document.write( "Substitute that into x-y=8 to solve for y:
\n" ); document.write( "18/5 -y = 8
\n" ); document.write( "y = 18/5 -40/5
\n" ); document.write( "y = -22/5
\n" ); document.write( "======================\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "And can I solve this in substitution method and get the answer x=18/5 and y=10/5
\n" ); document.write( "No, not if the work above is correct.
\n" ); document.write( "==================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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