Question

I really need help please!~
The combined land area of the countries A and B is 145,973 square kilometers. Country A is larger by 573 square kilometers. Determine the land area of each country.

The land area of country A is how many square kilometers?
Anyone out there?

Answer 1

Suppose \(x\) is the land area of A. You know that Country A has 573 km² more than Country B, which means the land area of B is \(x-573\).

The total is 145,973, so you have the equation:
\[\color{red}A+\color{blue}B=145,973\\
\color{red}{x}+\color{blue}{x-573}=145,973\]
Solve for \(x\).

Answer 2

So you have A + B = 145,973
And A = B + 573
Do you see how I got that?

Answer 3

This is a system of equations problem, we start by saying A + B = 145,973

Answer 4

now the problem says:
Country A is larger(than B) by 573 square kilometers
How do we write that in math language? @DebbieZ

Answer 5

Country A is larger(than B) by 573 square kilometers
That means,
If I have B
and I add 573 to it
I will have A

Answer 6

We have everything we need to solve this problem
Do you have a guess on how to continue?
We can solve by substitution
We can plug in B + 573
for A in the first equation