document.write( "Question 1207383: The equation 5/(x + 3) + 3 = (8 + x)/(x + 3) has no solution, yet when we go through the process of solving it we obtain x = -3. Why is that the case? \n" ); document.write( "
Algebra.Com's Answer #852187 by ikleyn(52781)![]() ![]() You can put this solution on YOUR website! .\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The value x = -3 is PROXIBITED for this equation, \n" ); document.write( "since the fractions in both sides of this equations are not defined at x = -3.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "As people say in Math, the value x = -3 is not in the domain of this equation, \n" ); document.write( "while we are looking for the solutions that ARE in the domain.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "When we get the solution x = -3, we get it for ANOTHER, transformed equation,\r \n" ); document.write( "\n" ); document.write( "and this value does not work for the original equation.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The original equation and the transformed equation are NOT equivalent.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "This is a complete explanation, in few words. Full and complete.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |