The combined land area of the countries A and B is 178,973 square kilometers. Country A is larger by 373 square kilometers. Determine the land area of each country.

X=area of the country A

y=area of the country B

we saggest this system of equations:

x+y=178,973

x=y+373

we solve this system of equations by substitution method.

(y+373) + y=178,973

2y=178,973-373

2y=178600

y=178,600/2=89,300

x=y+373

x=89300+373=89,673

answer:

area of the country A=89,673 Km²

area of the country B=89,300 Km²

To check

The combined land area of the countries A and B is = 89,673 Km²+89,300 Km²=178,973 Km²

Country A (89,673 Km²) is 373 Km² more larger than country B (89,300 Km²).

89,673 Km²=89,300 Km²+373 Km²