B. Translate each word into algebraic eqaution. (Use any letter)

1. Twice a number is 18. _____
2. The difference of a number and 5 is equal to 8. _____
3. The quotient of a number and 7 is 21. _____
4. Thrice a number plus 5 is 12. _____
5. The product of two and a number is 18. ______

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