document.write( "Question 338149: This system of equations still has me stumped. Your assistance to help me solve it by substitution method would be greatly appreciated.\r
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document.write( "2x - y = -4
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document.write( "3x + y = -1 \n" );
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Algebra.Com's Answer #242382 by kvlsravya(8)![]() ![]() ![]() You can put this solution on YOUR website! Let us assume the given system of equations as, \n" ); document.write( "2x - y = -4----(1) \n" ); document.write( "3x + y = -1----(2) \n" ); document.write( "Isolating y from (1), we get \n" ); document.write( "y = 2x + 4 \n" ); document.write( "Substituting y in (2), we get \n" ); document.write( "3x + (2x + 4) = -1 \n" ); document.write( "5x + 4 = -1 \n" ); document.write( "5x = -5 [Subtracting '4' from both sides] \n" ); document.write( "x = -1 [Dividing by '5' on both sides] \n" ); document.write( "Plugging in the value of x in the isolated equation that is \n" ); document.write( "y = 2x + 4 \n" ); document.write( "y = 2(-1) + 4 \n" ); document.write( "y = 2 \n" ); document.write( "Hence, solution to the given system of equations is x = -1 and y = 2. \n" ); document.write( " \n" ); document.write( " |