Explanation:
You would just need to remove the cube, or the exponent of 3. To do this you could cube root it or because it is a smaller number, you could figure it out by trial and error, because to the power of 3 you would have to figure out what could get multiplied by itself 3 times to get 27. It would be 3 as 3 x 3 x 3 =27, or 3^3 = 27. This would then mean x = 3.