Which is a characteristic of a strong base?
It turns pink phenolphthalein colorless.
It turns blue litmus paper red.
It releases H+ ions into a solution.
It removes H+ ions from solution.
O
O

It removes H+ ions from a solution.

Explanation:

A base turns phenolphthalein pink.

It turns  litmus paper blue not red.

In order to solve this, you can either find the range for x, or you can plug in the variables. 

-3(x - 4) > 6(x - 1)
-3x + 12 > 6x - 6
18 > 9x
2 > x

So you know x must be less than 2, and the only answer that meets this criteria is -1, so let's plug it in and see. 

-3(-1 - 4) > 6(-1 - 1)
-3 (-5) > 6(-2)
15 > - 12

This statement is true, so we know that -1 is the answer.