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

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