Question

√x+4=4

I know x=12 but how?

Answer 1

\[\large \sqrt{x+4} = 4 \rightarrow x+4 = 16 \rightarrow x = 12\]

Answer 2

This would be the second step, if you're missing that :)

\[(\sqrt{x+4})^2 = (4)^2\]

Answer 3

thanks alfie!