11-01-2018
Mathematics

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How to find the missing variable?

How to find the missing variable class=

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lesliekolleroxrkcf lesliekolleroxrkcf

11-01-2018

7x+12=3x+50. def of exterior angle

4x°38
x=9.5

3*9.5+50=missing angle
28.5+50=78.5
180-78.5=102.5

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