Answer:

Step-by-step explanation:
We start by adding
to both sides, giving
, which after simplifying gives
.
We then add
to both sides, giving
, which after simplifying gives
.
We can then divide both sides by
, giving
, which after simplifying gives
, or
. So, x is 5.
Answer:
D
Step-by-step explanation:
Add 7 and 3 which is 10
3^10 is 59049 which is the same as 3^7*3*3