if x-y=4 and x-2y=6, what is x+y? Please help ! It's easy , I know , but can't get the answer(

Question

if x-y=4 and x-2y=6, what is x+y? Please help !   It's easy , I know , but can't get the answer(

the_fizicx99 · Answer

Lol i was mid way through when I see it says "x+y" ._. 

Wonder if this helps, y = x - 4 

x -2(x-4) = 6

x -2x + 8 = 6
-x + 8 = 6
        
-x = -2
/-x   /-x

x = 2

2 - y = 4

-y = 2
/-1  /-1

y = -2

2 -(-2) = 4

2 - 2(-2) = 6

2 + 4 = 6

the_fizicx99 · Answer

Sorry lol I was doing mental math so I was ahead of what I was writing, 
2 -(-2) = 6

2 - 2(-2) = 6

2 + 4 = 6

the_fizicx99 · Answer

Lol, you understand what I did? I did this in notepad to test my theory. So its poorly written. What grade is this for btw?

anonymous · Answer

thanks too much :)))