Solve for xxx: 4x+1−22x+3+8x=04^{x+1} - 2^{2x+3} + 8^x = 04x+1−22x+3+8x=0.
x=3x = 3x=3
x=6x = 6x=6
x=2x = 2x=2
x=4x = 4x=4