If + = x , - = ÷ , x = + , ÷ = -

If + = x , - = ÷ , x = + , ÷ = - , then which is the correct equation out of the following ?

1. 18 ÷ 6 + 4 - 2 ÷ 3 = 22
2. 18 + 6 - 4 x 2 ÷ 3 = 26
3. 18 x 6 - 4 + 7 x 8 = 47
4. 18 - 6 x 7 ÷ 2 + 8 = 63

18 + 6 - 4 x 2 ÷ 3 = 26
After chaning, the equation is
L.H.S., 18 x 6 ÷ 4 + 2 - 3
108 ÷ 4 + 2 - 3
27 + 2 - 3
29 - 3 = 26 R.H.S.