Answer:
x = Â 12 Â Â Â ( two points shots )
y = Â 7 Â Â Â ( three points shots )
Step-by-step explanation:
Let´s call  "x" two points shots,  and  "y" three points shots, then
x  +  y  =  19
2*x  +  3*y  =  45
We have to solve a two-equation system for x and y
y = Â 19 Â - x
2*x  +  3 * ( 19 - x ) = 45
2*x  +  57  -  3*x  =  45
- x  =  45 - 57
-x  =  - 12
x  = 12
And   y  =  19  -  12
y  = 7