Question

5^x+2 = 3(4)^3x

Answer 1

solve algerbraically for x

Answer 2

remember, when you multiply exponents, you add them

THEREFORE:

if you move the 12^3x to the other side and the 2 to the other side, then you can take the x exponent in the 5^x and add it to the 3x in 12^3x. This leaves you with 60^4x

Then, since you know this equals -2, your final equation, unless you need to simplify further would be
60^4x = -2