Help with negative inequalities?
please answer these
these are off mymaths
- 9 years agoFavorite Answer
Move the X's on the left of the inequality and the nubers on the right.
When you change sides, you change sign.
21-3x>3 = -3x>3-21 (notice i changed 21 to -21) = 13x>-18 = DIVIDE -18 BY 13 = x>-1.38
In questions like these you change the number to a posotive number:
-x<-3 = x< 3 (imagine there is a one infront of the x, it would then loook like this ; -1x<-3. Then divide -3 by -1 and that will give you 3 because a minus multiplied by a minus is a plus...)
Hope this helps...Source(s): I have an igcse in mathematics...
- UpwardLv 79 years ago
Look at this does it help?
- 9 years ago
you need to take your time and think