What is the solution to this system of equations? x + 2 y = 4. 2 x minus 2 y = 5.

(x, y) = (5.8,-0.4)

Step-by-step explanation:

1.) x + 2y = 4.2 - 2y = 5

2.) { x + 2y = 5

{ 4.2 - 2y = 5

3.) { x + 2y = 5

{ y = - 0.4

4.) x + 2x (-4.0) = 5

5.) x = 5.8 (a possible solution)

6.) (x, y) = (5.8, - 0.4) check to the solution

7.) 5.8 + 2 x (-0.4) = 4.2 - 2 x (-0.4) = 5

8.) 5 = 5 = 5

y=1/2