Question 913405
ax +b =px +q 
ax - px = q - b
x(a-p) = (q-b)
x = (q-b)/(a-p)
............
 g (x +1)= f -x 
gx + g = f - x
gx + x = (f-g)
x(g+1) = (f-g)
x = (f-g)/(g+1)