I own a restaurant. At breakfast today I have 150 customers. On my cash register, there are records of the orders made today. The screen is cracked, and I need to figure out what is listed in the cracked part of the screen. The screen shows that:
Eggs ordered: x
Bacon ordered: y
PBJ ordered: z
Eggs and bacon ordered: 40
Eggs and PBJ ordered: 20
Bacon and PBJ ordered: 25
Eggs, bacon, and PBJ ordered: 10
What is x+y+z?
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Answer:225
We have to find it by using set theory
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