Question

$\sqrt{3 x + 1} = 5$

Answer 1

$\sqrt{3x+1}=5 \\ \\ (\sqrt{3x+1})^2=5^2 \\ \\ 3x+1=25 \\ \\ 3x=25-1 \\ \\ 3x=24 \\ \\ \boxed{x=8}$

Answer 2

(V3x+1)^2 = 5^2
3x + 1 =25
3x = 25 - 1
3x= 24
   x= 8