document.write( "Question 670550: Why do you flip the sign of an inequality when multiply or dividing by a negative number? \n" ); document.write( "
Algebra.Com's Answer #417021 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Why do you flip the sign of an inequality when multiply or dividing by a negative number? \n" ); document.write( "================= \n" ); document.write( "It gives the correct result. \n" ); document.write( "------- \n" ); document.write( "eg\r \n" ); document.write( "\n" ); document.write( "-x > 1 \n" ); document.write( "x < -1 \n" ); document.write( "-------- \n" ); document.write( "Another method: \n" ); document.write( "-x > 1 \n" ); document.write( "Add x \n" ); document.write( "0 > x + 1 \n" ); document.write( "Subtract 1 \n" ); document.write( "-1 > x \n" ); document.write( "x < -1 same answer \n" ); document.write( " \n" ); document.write( " |