If f(x)=x+2f(x) = x + 2f(x)=x+2 and g(x)=3xg(x) = 3xg(x)=3x, what is (f∘g)(x)(f \circ g)(x)(f∘g)(x)?
3x+23x + 23x+2
3x+33x + 33x+3
x+6x + 6x+6
x+2x + 2x+2