It's

because this choice made the most since.
Answer:
x = 12
Step-by-step explanation:
__9x__ = __108___
9 9
x = 12
Answer:
205-160=<em>d</em>
Step-by-step explanation:
Answer:
When the two values are different
Step-by-step explanation:
Like in an inequality equation.
For example:

The answer would be anything greate than or equal to 30, but you would need to find x. The number line would be very useful
Hope this helps