Answer:

B. 20
Step-by-step explanation:
<em>First, you divide by 5 from both sides of equation.</em>
<em>
</em>
<em>Simplify, to find the answer.</em>
<em>
</em>
<em>
, which is our answer.</em>
Answer: A is the answer
Explanation: A plane consist of 3 point but it can also be called by one specific point. And in the figure A there is one specific point. We can call it plane A