Question 52882
I'm having to use extra parenthesis because the computer erases part of the inequality if I don't.
If (a)<(b), then (-a)>(-b) because whenever you multiply or divide by a negative number you flip the inequality sign.  If we multiply each side of the inequality (a)< (b) by -1 the following happens:
(a)<(b)
(-1)a>(-1)b
-a>-b