Solution - Power equations

Step  1  :

 1.1     243 = 35

(243)¹ = (3⁵)¹ = 3⁵

Equation at the end of step  1  :

Step  2  :

            35
 Simplify   ——
            3 

Dividing exponents :

 2.1    3⁵   divided by   3¹   = 3^{(5 - 1)} = 3⁴

Final result :

  81