document.write( "Question 1026079: How do you solve for substitution equations?\r
\n" ); document.write( "\n" ); document.write( "-4x + y = 6
\n" ); document.write( "-5x - y = 21
\n" ); document.write( "

Algebra.Com's Answer #641331 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
How do you solve for substitution equations?
\n" ); document.write( "-4x + y = 6
\n" ); document.write( "-5x - y = 21
\n" ); document.write( "----
\n" ); document.write( "Solve one of the equations for \"y\"::
\n" ); document.write( "y = 4x+6
\n" ); document.write( "---
\n" ); document.write( "Substitute for \"y\" in the other equation and solve for \"x\"::
\n" ); document.write( "-5x -4x-6 = 21
\n" ); document.write( "------
\n" ); document.write( "-9x = 27
\n" ); document.write( "-----
\n" ); document.write( "x = -3
\n" ); document.write( "------------
\n" ); document.write( "Solve for \"y\"::
\n" ); document.write( "y = 4x+6
\n" ); document.write( "y = 4*-3+6
\n" ); document.write( "y = -6
\n" ); document.write( "-------------
\n" ); document.write( "cheers,
\n" ); document.write( "Stan H.
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