Okay can somebody like help me with this I’m confused. And show work. There’s a video for this but it’s confusing me. I hate e-learning.

Step-by-step explanation:

Let the land area of country A = a
and the land area of country B = b

a + b = 199973
a = b + 573

(b + 573) + b = 199973
2b = 199400

b = 99700
a = 100273

The land area of country A is 100,273 square kilometers
and the land area of country B is 99,700 square kilometers.