Linear eqns in one variable

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Across
  1. 3. numbers with a fixed value
  2. 7. heh
  3. 8. special type of algaebric expressions that can have any term having constants ,variables and exponents but the exponents should be whole number
  4. 9. letters with an unknown value
  5. 11. gaunt
  6. 13. property hush
  7. 15. hf
Down
  1. 1. hen
  2. 2. Jen
  3. 4. multiplication and addition of constants and variables
  4. 5. addition and subtraction of terms
  5. 6. grndu
  6. 10. Ben
  7. 12. hhdh
  8. 14. dud