Find the inverse of y=-3x+6

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

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?

Rounded to the nearest tenth, what is the value of x