Algebra terms

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Across
  1. 3. the process of replacing a variable with a number in an expression or equation
  2. 4. a mathematical statement without an equal sign
  3. 8. a number sentence that shows two expressions are equal using an equal sign
  4. 9. the coefficient of x^2 is 1
  5. 10. expressions where the highest power is x^2
  6. 12. to find the value of a mathematical expression or equation
  7. 14. a symbol used to represent an unknown value
Down
  1. 1. a number or expression that divides exactly into another number of expression
  2. 2. expressions with two terms
  3. 5. remove brackets
  4. 6. a variable or a number or both multiplied together
  5. 7. putting brackets in
  6. 11. the number that multiplies a variable in a term
  7. 13. expressions with three terms