Answer:
the value of x is 11.333 aproximate to 11.3
Explanation:
71° = (9X + 40) /2
71° ×2 = 9X + 40 ........ crisscros it
142° = 9X + 40
142-40 = 9X
9X = 102
X = 102/ 9
X = 11.333 ~ 11.3
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