Question

Enter the x coordinate of the solution to this system of equations.

- 2x + y = 5
– 5x + y = – 4

Answer 1

x = 3

Explanation:

Given the 2 equations

- 2x + y = 5 → (1)

- 5x + y = - 4 → (2)

Multiply (2) by - 1 then add to (1) to eliminate y

5x - y = 4 → (3)

Add (1) and (3) term by term to eliminate y

3x = 9 ( divide both sides by 3 )

x = 3