
Respuesta :
The answer to this could be A in my opinion because an algebraic equation does not always have an equal sign but the variable is usually a letter
Answer:
6. A
7. A
8. A
9. C.
10. A.
11. B.
12. B.
13. C.
14. A.
15. D.
Step-by-step explanation:
6. An algebraic equation is a mathematical sentence with an equal sign.
7. 3n + 6 = 66
8. Â Let n = Mayah's sister's age
  let m = Mayah's age
  let b = Mayah's brother's age
  m = n - 2
  b = n + 4
  m + b + n = 26
⇒ n - 2 + n + 4 + n = 26
⇒ 3n + 2 = 26
9. 2n - 5
10. 2b - 6 = 16
11. n + 5 = 12 Â
⇒  n = 7
12. c + 18 = 29 Â
⇒  c = 29 - 18 = 11
13. h = 8 · 5 = 8 × 5 = 40
14. 453 + 364 + n = 1000 Â
⇒  n = 1000 - 453 - 364
⇒  n = 183
15. 3n + 11 = 35 Â
⇒  3n = 35 - 11 Â
⇒ n = 24 ÷ 3
⇒ n = 8