Answer:
5. The sum of angles in a triangle is 180° so we can write:
9x - 16 + 3x + 11 + 7x - 5 = 180
19x - 10 = 180
19x = 190
x = 10°
6. Because the measure of an exterior angle is equal to the sum of its two remote interior angles we can write:
17x - 23 = 3x + 17 + 8x - 4
17x - 23 = 11x + 13
6x = 36
x = 6°
Step-by-step explanation:
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