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Answer :

Salukhalidgo

= 3x - 2 + 3x - 9 + 4x - 9 = 180 ( Angle sum property )

= 3x + 3x + 4x - 2 - 9 - 9 = 180

= 10x - 20 = 180

= 10x = 180 + 20

= 10x = 200

= x = 200 / 10

= x = 20

therefore the angle's are,

58, 51, 71.

HOPE IT HELPS !!!

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