Need help, someone explain

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asked Nov 19, 2020 128k views

1 Answer

Jtianling · Answer 1 · 2020-11-25T13:13:17+0000

Answer: X = 19

Step-by-step explanation: it is a three equation system, the problem is you don't have the third equation, so we have to infer it, and it's: PRQ + QRS = 180.

then we do as follows:

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