saabrrinnaaa saabrrinnaaa

12-11-2018
Mathematics

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please help me with this question

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juneiparis666 juneiparis666

12-11-2018

3x+5x-1+4x+2x+6x+1=540 (Sum of all int. angles of a pentagon is 540)

20x-0=540 (Add like terms)

20x=540 (addition property of equality)

x=27

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