Two opposite angles of a parallelogram are (3x - 2)° and (50 - x)°.

We know that,

Opposite sides of a parallelogram are equal.

(3x - 2)^° = (50 - x)^°

⟹ 3x + x = 50 + 2

⟹ 4x = 52

⟹ x = 13^°

Therefore, (3x - 2)^° = (3*13 - 2) = 37^°

(50 - x)^° = (50 - 13) = 37^°

Adjacent angles of a parallelogram are supplementary.

∴ x + 37 = 180°

∴ x = 180° − 37° = 143°

Hence, four angles are: 37^°, 143^°, 37^°, 143^°.