Posted by Anonymous on Monday, November 30, 2009 at 9:09am.
Why does the inequality sign change when both sides are multiplied or divided by a negative number? Does this happen with equations? Why or why not? Write an inequality for your classmates to solve. In your inequality, use both the multiplication and addition properties of inequalities.

algebra  brooke, Monday, November 30, 2009 at 11:39am
by multiplying/dividing by a negative number, you are distributing that negative to every part of the equation, making everything effected by the negative opposite. In order to make an inequality sign opposite, you must flip it. with equations you still must multiply/divide everything by the negative, but you can not change an = they are not affected.
3x+18>21

algebra  none, Thursday, December 16, 2010 at 3:39pm
x<1
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