URGENT PLEASE EXPLAIN WHY ITS CORRECT ASWELL

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Pavel Korsukov · Answer 1 · 2021-03-16T02:13:21+0000

Answer: 20.1

Step-by-step explanation: Based on triangle sum theorem all angles add up to 180. 3x-11+6x-10+x=180

Combine like terms. 10x-21=180

Add 21 to both sides. 10x=201

Divide by 10 on both sides. X=20.1