Question

I cannot solve the equation.
√(7d+1)-4=11

Answer 1

I believe the answer is d = 32

Explanation:

You should isolate the radical, then raise each side of the equation to the power of its index.

Answer 2

9514 1404 393

Answer:

d = 32

Explanation:

Add 4, then square, and solve the resulting linear equation.

√(7d +1) = 15

7d +1 = 225 . . . . . . square both sides

7d = 224 . . . . . . . . subtract 1

d = 32 . . . . . . . . . . divide by 7