(x to the third power) n + 2 = (XN-1 to the fourth power), find the value of (n to the third power) to the fourth power

(x to the third power) n + 2 = (XN-1 to the fourth power), find the value of (n to the third power) to the fourth power

3(n+2)=4(n-1)
n=10
(3 times of n) 4 times = 12 times of 10