Linear eqns in one variable

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