What number increased by two is equal to two less than twice the number?

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

How do i do this activity, is appreciated

Is the point (0, 8) on the x-axis or y-axis? how do you know?