Respuesta :

Answer:

Yup the answer is 15!

Step-by-step explanation:

(3x + 4)^(1/2) = 7  

3x + 4 = 49  

3x = 45

x = 15

Answer:

15.

Step-by-step explanation:

√(3x + 4) = 7

Square both sides:

3x + 4 = 49

3x = 49 - 4 = 45

x = 45/3 = 15.