To answer this item, we let x be the number of 2-point shot made by Pietro. With this representation, the number of 3-point shots made was 0.5x + 2. Adding the two expression is supposed to give us 20. Then, the answer would be,
x + (0.5x + 2) = 20
The value of x is 12. Therefore, Pietro made 12 2-point shots and 8 3-point shots.