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1. sum of numbers is x+y=67, the difference between them is x-y=11
2. it is possible to make up and resolve the system:
Answer:
I hope your question is 4x²+3x+5, then the degree of this polynomial is 2
11:10am
20 minutes before 12 noon is 11:40am
30 minutes before 11:40am is 11:10am