√(22-x) - √(10-x) = 2
√(22-x) = 2 + √(10 - x)
22 - x = 4 + 4√(10 - x) + 10 - x
22 = 4 + 4√(10 - x) + 10
22 = 14 + 4√(10 - x)
-4√(10 - x) = 14 - 22
√(10 - x) = 2
10 - x = 4
- x = 4 - 10
x = 6
