Question

The square root of four more than three times a number is seven. Find the number.

The answer should be 15.

Please, and thank you!

Answer 1

Yup the answer is 15!

Explanation:

(3x + 4)^(1/2) = 7

3x + 4 = 49

3x = 45

x = 15

Answer 2

15.

Explanation:

√(3x + 4) = 7

Square both sides:

3x + 4 = 49

3x = 49 - 4 = 45

x = 45/3 = 15.