2x + y = 5

x + y = 4

2x + y = 5 and x + y = 4

If you need to find x and y, then you can rearrange the equations like so:

x = 4 - y

lets plug this into the first equation:

2 (4 - y) + y = 5

8 - 2y + y = 5

8 - 1y = 5

-1y = - 3

y = 3

So now that we have y, we can plug it into either equation to get x:

x + 3 = 4

x = 1