Find xxx if 3x+3x+1+3x+2=3513^{x} + 3^{x+1} + 3^{x+2} = 3513x+3x+1+3x+2=351.
x=2x = 2x=2
x=3x = 3x=3
x=4x = 4x=4
x=5x = 5x=5