Genetics may cause a difference in health tendencies
16 = 1/3x -4
Add 4 to each side
1/3x = 20
Multiply each side by 3
3*(1/3x) = (3)*20
x = 60
The answer is Constructivist approach or theory. This means children do make an understanding of their world based on what they know and do not know. Piaget was the psychologist making a study of children's cognitive development. He develop the stages of development explaining how a child construct his or her own world.
Since Nirja has 6 more you subtract 6 from 24 and you get 18 so Tim has 18 marbles
24-6=18 marbles