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10-10-2018
Mathematics

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Find the value of x.

Find the value of x class=

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choixongdong choixongdong

10-10-2018

Sum of interior angles in a triangle = 180

so

x + x + 12 + x - 9 = 180

3x + 3 = 180

3x = 177

x = 59

Answer

x = 59

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