How do u solve 9> - r

I never learned the rules of when you must change the direction

of the inequality. But you can solve this one without even knowing

that rule:

You said 9 > - r

Add 'r' to each side: r + 9 > 0

Subtract 9 from each side: r > - 9

Basically, you have to divide by - 1 on both sides and when ever you divide any side of the inequality by a negative number, you would have to switch the signs.

So:

9>-r

9/-1 > - r/-1

-9
or

r>-9