In this sample, are the events "2 doors "and "4 doors " mutually exclusive

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3

Given abc find the values of x and y. in your final answer, include all of your calculations.