Answer:
Step-by-step explanation:
From the problem statement, we can set up the following two equations:
[tex]K + N = 30[/tex]
[tex]20K + 10N = 500[/tex]
where [tex]K[/tex] is the number of Knicks players, and [tex]N[/tex] is the number of Nets players.
We can substitute the first equation into the second and solve for [tex]K[/tex]
[tex]K + N = 30[/tex]
[tex]N = 30 - K[/tex]
[tex]20K + 10N = 500[/tex]
[tex]20K + 10(30 - K) = 500[/tex]
[tex]20K + 300 - 10K = 500[/tex]
[tex]10K + 300 = 500[/tex]
[tex]10K = 200[/tex]
[tex]K = 20[/tex]