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Sagot :

KurdishPotatoidn

Answer:

75

Step-by-step explanation:

The sum of two interior angles in a triangle is equal to an exterior angle that is supplementary to the third interior angle:

3x + 2 + 55 = 13x - 3 add like terms

3x + 57 = 13x - 3 export like terms to the same side

57 + 3 = 13x - 3x

60 = 10x divide both sides by 10

6 = x to find angle FAB replace x with 6

13*6 - 3 = 75

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