document.write( "Question 94892: A student claims that the equation 5x = 4x is a contradiction, since dividing both sides by x leads to 5 = 4, a false statement. Explain why the student is incorrect. \n" ); document.write( "
Algebra.Com's Answer #69439 by bucky(2189) ![]() You can put this solution on YOUR website! Because if x equals zero the equation becomes: \n" ); document.write( ". \n" ); document.write( "5*0 = 4*0 \n" ); document.write( ". \n" ); document.write( "and this reduces to: \n" ); document.write( ". \n" ); document.write( "0 = 0 \n" ); document.write( ". \n" ); document.write( "and this is true. (And if x is allowed to equal zero, you cannot divide both sides by \n" ); document.write( "x because division by zero is not allowed.) \n" ); document.write( ". \n" ); document.write( "So there you have an exception to what the student proposed, so the student is incorrect. \n" ); document.write( ". \n" ); document.write( "Hope this makes sense to you. \n" ); document.write( " \n" ); document.write( " |