Algebra Terminologies

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Across
  1. 2. A number placed before and multiplying the variable
  2. 5. A combination of mathematical quantities and symbols
  3. 6. to find the answer;solve
  4. 7. Two expressions that are equal and have =
  5. 8. A single mathematical expression
Down
  1. 1. A letter that is a placeholder for a quantity
  2. 3. What are -,+,x,÷?
  3. 4. A value or expression that never changes