Answer:
its 34
Step-by-step explanation:
Zero property is what it's called
In the left hand side, you're multiplying 7.8 by 
In the right hand side, you're multiplying again 7.8 by a mysterious number.
So, the unknown number must be 
Every number remains unchanged when multiplied by 1, so the answer is 3.6
Answer:
B
Step-by-step explanation:
total number of people minus people who prefer soda, iced tea, or lemonade= people who prefer water
450-101-67-108=174