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Summarizing Information## i found the videos very

## yeah, great effort and

## Really good and easy to

## Can you please explain how

## Once we have two different

Once we have two different linear equations with 2 variables, we can solve that system for the two variables. In other words, we can find the exact values of B and G.

This is covered in these two videos:

- https://www.gmatprepnow.com/module/gmat-algebra-and-equation-solving/vid...

- https://www.gmatprepnow.com/module/gmat-algebra-and-equation-solving/vid...

Let's take the first statement where we have:

B = 2G

B + G = 27

Since B = 2G, we can take the second equation B + G = 27, and replace B with 2G.

We get: 2G + G = 27

Simplify: 3G = 27

Solve: G = 9

Once we know that G = 9, we can take one of our equations (e.g., B = 2G) and replace G with 9.

We get: B = 2(9) = 18

So, G = 9 and B = 18

In other words, there are 18 boys.

Does that help?

Cheers,

Brent

## It makes sense now, thank you

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