Solve for x :

(a^{3x + 5})².(a^x)⁴ = a^{8x + 12}

Solve for x :

2^{3x + 3} = 2^{3x + 1} + 48

Solve for x :

3(2^x + 1) - 2^{x + 2} + 5 = 0