Saadiya
Saadiya Saadiya
  • 15-01-2021
  • Mathematics
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Urgent help need it plz help ​

Urgent help need it plz help class=

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Rayana322
Rayana322 Rayana322
  • 15-01-2021
Answer: x = 9

Explanation:

Add the three angles up, and equal them to 180, as a triangle has 180*.

(13x + 2) + (3x - 4) + (5x - 7) = 180
Add together the like terms.
13x + 3x + 5x = 21x
2 + (-4) + (-7) = 9

21x + 9 = 180
21x = 189 (subtract 9 from both sides)
x = 9 (divide 21 from each side)
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