If (x -1, y +1) = (0,0) then (x,y) is.

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2 + 1 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

If (x -1, y +1) = (0,0) then (x,y) is:

(-1,1)

(1,1)

(-1,-1)

(1,-1)