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10-10-2018
Mathematics

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Use the figure below to find the value of x.

Use the figure below to find the value of x class=

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choixongdong choixongdong

10-10-2018

Sum of interior angles in a triangle = 180

2x - 1 + 11x + 3 + 5(x - 4) = 180

13x + 2 + 5x - 20 = 180

18x - 18 = 180

18x = 198

x = 11

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