Answer:
x=4/5
Explanation:
6^x^10 = 6^12 / 6^4
We know that a^b^c = a^(b*c)
6^x^10 = 6^10x
and
We know a^b / a^c = a^(b-c)
6^12 / 6^4 = 6^(12-4) = 6^8
Replacing into the original equation
6^x^10 = 6^12 / 6^4
6^(10x) = 6^8
The bases are the same, so the exponents must be the same
10x = 8
Divide each side by 10
10x/10 = 8/10
x = 4/5