AdrianN16
AdrianN16
31-03-2017
Mathematics
contestada
find X need help math
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baabaagreysheep
baabaagreysheep
31-03-2017
The rule for angles in a triangle is that they all need to add up to 180°, so you can make the three expressions equal 180 and solve:
x + 10 + x + 2 + 9x - 8 = 180
11x + 4 = 180
- 4
11x = 176
÷ 11
x = 16
So your answer is 16
I hope this helps!
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