Question

Consider the system of equations 3x + y = 10 and 6x – y = 17 . What is the value of the x-coordinate of its solution?

Answer 1

Answer: the answer should be x = 3

Explanation:

Answer 2

x = 3

Explanation:

These are simultaneous linear equations hence, we add them because +y and -y will cancel eachother.

3x + y = 10

6x - y = 17

____________

9x = 27

x = 27/9

x = 3

So, x- coordinate is 3