Question

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

Answer 1

y=1/2

Explanation:

Answer 2

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

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