# math

posted by deedee

Solve by multiplication principle
-2x is greater than 1/9
answer: x is greater than -1/18

1. Damon

- 2 x > 1/9
divide both sides by - 2 AND change direction of arrow
x < -1/18
when you multiply (divide) both sides of an inequality by a negative, you reverse the arrow

2. deedee

Thank you

3. Damon

-x > 1
that would be everything to the left of -1

Now do the algebra, multiply both sides by -1 and reverse arrow:
x < -1 sure enough

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