2x-4y=8
x+2y=4
How many solutions (x, y) are there to the system of equations above? explain

Exactly one solution.

Step-by-step explanation:

2x-4y=8

x+2y=4    /*2

2x-4y=8

2x+4y=8 (+)

4x=16

x=4

4+2y=4

y=0

(x;y)={(4; 0)}

Exactly one solution.

typically if you want , you would actually put questions here for us to you. but hey, that's just me. maybe someone will magically answer the questions for you without knowing what they are.

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1