Algebra Crossword Puzzle

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Across
  1. 3. The order in which you solve a problem
  2. 5. Represent the variation of a variable
  3. 6. I can say two things are equal to each other
  4. 7. I am a multiplicative factor placed in front of a variable
  5. 8. This word represents a symbol used for circles
  6. 10. Replace a variable with its equivalent
  7. 11. I always stay the same
  8. 12. The result of a division problem
  9. 13. I represent information symbolically
Down
  1. 1. I am made up of numbers, variables, and operations
  2. 2. I am always part of a number
  3. 3. The result of a multiplication problem
  4. 4. A letter used to describe a number
  5. 6. I hide above the world to multiply it by itself
  6. 9. I am a whole number that occurs naturally positive or negative