What is 2x+y=4 and 2x+y=-1

{x, y} = {5,6}

Step-by-step explanation:

/ / Solve equation [1] for the variable x

[1] x = y - 1

/ / Plug this in for variable x in equation [2]

[2] 2• (y - 1) - y = 4

[2] y = 6

/ / Solve equation [2] for the variable y

[2] y = 6

/ / By now we know this much:

x = y-1

y = 6

/ / Use the y value to solve for x

x = (6) - 1 = 5

It's a math question