document.write( "Question 126731: 3x+2y=8 and y=x-1, then x= \n" ); document.write( "

Algebra.Com's Answer #92850 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"3x+%2B+2y+=+8\"$ and $\"y+=+x+-+1\"$
\n" ); document.write( "Substitute $\"y\"$ in the 2nd equation
\n" ); document.write( "for $\"y\"$ in the 1st
\n" ); document.write( " $\"3x+%2B+2%28x+-+1%29+=+8\"$
\n" ); document.write( " $\"3x+%2B+2x+-+2+=+8\"$
\n" ); document.write( " $\"5x+=+10\"$
\n" ); document.write( " $\"x+=+2\"$
\n" ); document.write( "check:
\n" ); document.write( " $\"y+=+x+-+1\"$
\n" ); document.write( " $\"y+=+2+-+1\"$
\n" ); document.write( " $\"y+=+1\"$
\n" ); document.write( " $\"3x+%2B+2y+=+8\"$
\n" ); document.write( " $\"3%2A2+%2B+2%2A1+=+8\"$
\n" ); document.write( " $\"6+%2B+2+=+8\"$
\n" ); document.write( "OK \n" ); document.write( "

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