Question

Which of the following is a solution made up by x + y=27 and y=2x?

Answer 1

4. x = 9 and y = 18

Explanation:

Hello there!

When given such a problem we have to methods to handle this:

1. substitution method
2. elimination method.

On this problem, let's limit ourself to substitution method;

x + y = 27 ..................... eq.1

y = 2x ........................ eq.2

Eq.2 is already manipulated. Substitute it into eq.1

x + y = 27

=> x + 2x = 27

3x = 27

x = 9

Substitute x into eq.2

y = 2 (9)

= 18

In terms of x and y;

(x, y) => (9, 18)

I hope this helps you.

Have a nice time and nice studies.