After you’ve solved an equation, you can check the answer by substituting the answer you got for into the equation. Then, you check to see if you get the same result on both the left-hand and the right-hand side.
Check if is a solution to
Substituting on the left-hand side gives you
Substituting on the right-hand side gives you
Note! It is possible for there to be more than one solution for in many equations, especially those where is raised to a power.