Respuesta :

Answer:

#3. n = 1

#5. x = 2

Step-by-step explanation:

#3.

n x n - 5 = -4

n x n = 5 + -4

n x n = 1

n = 1

#5.

7x^2 + 1 = 29

7x^2 = 29 - 1

7x^2 = 28

x^2 = 28 / 7

x^2 = 4

x = 2

Hope that helps!