document.write( "Question 601777: I need to know how to solve these equations using substitution thanks:)
\n" ); document.write( "-x+y=7 and -1/2x-y=2 \n" ); document.write( "
Algebra.Com's Answer #379995 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
solve these equations using substitution thanks:)
\n" ); document.write( "-x+y=7
\n" ); document.write( "-1/2x-y=2
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\n" ); document.write( "Solve either of the equations for x or for \"y\":
\n" ); document.write( "y = x+7
\n" ); document.write( "---
\n" ); document.write( "Substitute into the other equation:
\n" ); document.write( "(-1/2)x -(x+7) = 2
\n" ); document.write( "(-1/2)x - x - 7 = 2
\n" ); document.write( "---
\n" ); document.write( "(-3/2)x = 9
\n" ); document.write( "x = (-2/3)9
\n" ); document.write( "x = -6
\n" ); document.write( "-----
\n" ); document.write( "solve for \"y\":
\n" ); document.write( "y = x + 7
\n" ); document.write( "y = -6+7
\n" ); document.write( "y = 1
\n" ); document.write( "=============
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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