The combined land area of the countries A and B is 157,973 square kilometers. Country A is larger by 773 square kilometers. Determine the land area of each country.

The combined land areas of country A & B are 157,973 sq km. COuntry A is larger by 773 sq kn. The land area of Country A is 79,373, the land area of Country B is 78,600.

A + B = 157,973

A = B + 773

now its just a matter of subbing

(B + 773) + B = 157,973

2B + 773 = 157,973

2B = 157,973 - 773

2B = 157,200

B = 157,200/2

B = 78,600 < = = = land area for country B

A = B + 773

A = 78,600 + 773

A = 79,373 < = = land area for country A