Answer:
The baskets that counted three points was [tex]209[/tex]
Step-by-step explanation:
Let
x-----> number of baskets of two points
y-----> number of baskets of three points
we know that
[tex]2x+3y=1,489[/tex] ----> equation A
[tex]x+y=640[/tex] ----->[tex]x=640-y[/tex] ------> equation B
substitute equation B in equation A and solve for y
[tex]2(640-y)+3y=1,489[/tex]
[tex]1,280-2y+3y=1,489[/tex]
[tex]y=1,489-1,280=209[/tex]
