Question

9. From the sum of 3x – y + z and -y –z, subtract 3x - y - z. What is the coefficient of x in the result?
10. The sum of two expressions is x - y - 2xy + yz – 7. If one of them is 2x + 3y – 7yz + 1, find the other.
11. By how much is 2x – 3y + 4z greater than 2x + 5y – 6z + 2?
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Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

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