18 - x2 = 14

Assuming x2 means x^2:

• Start: 18 - x^2 = 14
• Move terms: subtract 14 from both sides or add x^2 to both sides → x^2 = 4
• Take square roots: x = 2 or x = -2

Check: 18 - (±2)^2 = 18 - 4 = 14, which holds for both.

Answer: x = 2 or x = -2.