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elena-14-01-66 [18.8K]
3 years ago
13

The value of x is _____

Mathematics
1 answer:
givi [52]3 years ago
7 0
Angle TRS is equal to 180 - 9x (straight angles).  

The sum of all the interior angles of a triangle is 180.  Thus,

180 - 9x + 5x + 9 + x = 180, resulting in -9x + 5x + 9 + x = 0. 
Then -4x + x = -9, or -3x = -9, or x = 3 (answer)
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