Question 462157
a) Let x be the number of field goals and y be the number of free-throws.

b) The total points from field goals is 2*x.
   The total points from free-throws is y
c) The number of times that James scored during the game is x+y = 19.
   Because he scored a total of 28 points 2*x+y = 28
So we will need to solve the linear system of equations
x+y = 19
2*x+y = 28

*[invoke linear "x", "y", 1, 1, 19, 2, 1, 28]