Question

3^(x+3) + 3^(x-1) = 4^(x+6)

Answer 1

Explanation:

x^3 + 9 + x^3-1 = x^4 +1296

2x^3 + 8= x^4 +1296

2x^3- x^4 = 1296-8

2x^3- x^4= 1288