Shlumps
Shlumps Shlumps
  • 03-07-2017
  • Mathematics
contestada

Find the value of x.

Find the value of x class=

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Banabanana
Banabanana Banabanana
  • 03-07-2017
An exterior angle of a triangle is equal to the sum of the opposite interior angles, so:

8x + 15 = 3x + 20 + 4x + 5
8x + 15 = 7x + 25
8x - 7x = 25 - 15
x = 10

Answer Link
ARYANAGARWAL ARYANAGARWAL
  • 03-07-2017
(4x+5) + (3x+20) = 8x+15
[Reason - Exterior angle is equal to sum of its two interior angles]

7x + 25 = 8x + 15
x = 10
Answer Link

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