document.write( "Question 351045: solve the system by the substitution method.\r
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document.write( "5x+2y=1
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document.write( "4x-y=1\r
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document.write( "what is the solution set? \n" );
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Algebra.Com's Answer #250908 by stanbon(75887) ![]() You can put this solution on YOUR website! solve the system by the substitution method. \n" ); document.write( "5x+2y=1 \n" ); document.write( "4x-y=1 \n" ); document.write( "---- \n" ); document.write( "Solve the 2nd equation for \"y\": \n" ); document.write( "y = 4x-1 \n" ); document.write( "------------------ \n" ); document.write( "Substitute into the 1st equation and solve for \"x\": \n" ); document.write( "5x + 2(4x-1) = 1 \n" ); document.write( "5x + 8x -2 = 1 \n" ); document.write( "13x = 3 \n" ); document.write( "x = 3/13\r \n" ); document.write( "\n" ); document.write( "============ \n" ); document.write( "Solve for \"y\": \n" ); document.write( "y = 4(3/13)-1 \n" ); document.write( "y = 12/13 - 13/13 \n" ); document.write( "y = -1/13 \n" ); document.write( "========================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "================== \n" ); document.write( " \n" ); document.write( " |