Question

slove and please show explaining I have no idea how to work these!

Answer 1

\[\sqrt{2x}-4=8\]

Answer 2

@jim_thompson5910

Answer 3

the idea is to isolate x, so you follow PEMDAS in reverse like this

\[\large \sqrt{2x}-4=8\]

\[\large \sqrt{2x}-4+4=8+4\]

\[\large \sqrt{2x}+0=12\]

\[\large \sqrt{2x}=12\]

\[\large (\sqrt{2x})^2=(12)^2\]

\[\large 2x=144\]

I'm sure you see what to do from here