Question

How do you solve `sqrtx + 4 = -3`?

Answer 1

There's no real answer to this one.

Explanation:

If you subtract `4` on both sides you get:

`sqrtx=-7`

Now, by definition, a square root cannot have a negative argument, nor a negative outcome, so there is no answer in the real numbers.
See domain and range of the graph below:
graph{sqrtx [-7.05, 24.98, -6.8, 9.22]}