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6 viewed last edited 1 year ago
Anonymous
0
How do I know when to change the inequality symbol to the other direction when solving?
Mahesh Godavarti
1

Only when you are multiplying or dividing both sides by a negative number. Otherwise, you don't change the direction of the inequality.


Note that if you rewrite x \lt y to have y on the left and x on the right then you will have to switch the inequality sign.


Note that the pointy end is always pointing at the smaller quantity.


Therefore, x \lt y is the same as y \gt x .


This is a key fact to remember.