willjean6978
03.06.2021 •
Mathematics
Some one say that if you multiply or divide each side of an inequality by a negative number, the inequality sign changes directions. He give an example: -2x < 6, then x > -3. Is the statement true or false?
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Ответ:
True
Step-by-step explanation:
Ответ:
Step-by-step explanation:
It is true!
Let's say we subtract 6 from both sides
-2x -6< 0 Now Let's add 2x to both sides
-2x + 2x - 6 < 0 + 2x
- 6 < 2x We did so we would be dividing by a number greater than 0. Divide by + 2
-6/2 < 2x / 2
-3 < x Notice you still get the open end of the inequality sign closest to the x without changing the direction of the inequality.
Ответ: