Answer:
x = 9
Explanation:
6^7 ÷ 6^3 • 6^5 = 6^x
Dividing 6^7 by 6^3 is 6^4, because x^a ÷ x^b = x^(a-b).
In other words:
If the base is the same, then you subtract the exponents and keep the base if it is division, and if it is multiplication, you add the exponents.
Knowing that, you could do:
6^(4+5) which is 6^9