28-09-2020
Mathematics

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FIND THE VALUE OF X (problem in picture, geometry)

FIND THE VALUE OF X problem in picture geometry class=

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jimrgrant1 jimrgrant1

28-09-2020

Answer:

x = 12

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Sum the 3 angles and equate to 180

8x - 1 + 3x + 4 + 3x + 9 = 180 , that is

14x + 12 = 180 ( subtract 12 from both sides )

14x = 168 ( divide both sides by 14 )

x = 12

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