Justinians attempts to reconquer western territory left the east open to attacks by Persians and Slavs.
Justinian had come to the throne in 527. War with the Persians began in 540 and continued until a 50-year peace agreement was signed in 561.
The Sclaveni (as the Slavs then were known) gave Justinian problems in the Balkan region.
It took 6000 hours......................
The question is posted in Wrong subject category. Anyways, the solution is stated below:

The base on both sides are same i.e. 6. For the equation to be true, the exponents(powers) must also be the same. So this means
Therefore, answer to this question is x = 1