Question

2+2=?

Answer 1

take 2 as common
2(1+1)
1+1 = 2
2(2) = 4

Answer 2

or
2+2

Add 2 to 2 to get 4.
4

Answer 3

let
2+2=x
2(1+1)=x
1+1=x/2
1=x/2 -1
multiplying throghout with 2
2=x-2
therfore
x=4

Answer 4

thx