document.write( "Question 301617: Solve using the subtitution method. 5x + 3y= -1
\n" ); document.write( " x + y = 1 \n" ); document.write( "

Algebra.Com's Answer #216273 by Fombitz(32388) $\"\"$ $\"About$

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1. $\"5x+%2B+3y=+-1\"$
\n" ); document.write( "2. $\"x+%2B+y+=+1\"$
\n" ); document.write( "From eq. 2,
\n" ); document.write( " $\"x=1-y\"$
\n" ); document.write( "Substitute into eq. 1,
\n" ); document.write( " $\"5%281-y%29%2B3y=-1\"$
\n" ); document.write( " $\"5-5y%2B3y=-1\"$
\n" ); document.write( " $\"-2y=-6\"$
\n" ); document.write( " $\"highlight_green%28+y=3%29\"$
\n" ); document.write( "Now use either equation to solve for x.
\n" ); document.write( " $\"x=1-y\"$
\n" ); document.write( " $\"x=1-3\"$
\n" ); document.write( " $\"highlight_green%28+x=-2%29\"$ \n" ); document.write( "

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