Please i need your help for these problems:

1. if f(g(1/x)) = (x+2)x and f(x) and f(x)= 1/(3-x), find g(x).

2. Find the equation of the line through the origin and bisecting the angle between the axes in the first and third quadrants.

3. Findaso that the system below has an infinite number of solutions

ax + (2/3)y = 1/2

2x + (3/2)y = 9/8