document.write( "Question 1026079: How do you solve for substitution equations?\r
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document.write( "-4x + y = 6
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document.write( "-5x - y = 21 \n" );
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Algebra.Com's Answer #641331 by stanbon(75887) ![]() 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. \n" ); document.write( "------------- \n" ); document.write( " |