Enter the correct answer in the box.
rewrite the equation for x, and express its value in terms of a.
3x – 4= 20

Im literally having a mental breakdown

This is about circle theorems. someone asap : (

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?