Answer:
Step-by-step explanation:
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All of the interior angles of a triangle sum to 180 °
8x+5 + 5x-1 + 4x+6 = 180
17x + 10 = 180
17x = 170
x = 10
then the angles are 8(10) + 5 = 85° 5(10) -1 = 49° and 4(10)+6 = 46°
