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17-02-2021
Mathematics

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help help help MARK BRAINLEST

help help help MARK BRAINLEST class=

Respuesta :

Аноним Аноним

17-02-2021

Answer:

x=18

Step-by-step explanation:

S=(n-2)180

S=(5-2)180

S=3x180

S=540

540=(9x-6)+(3x+23)+95+((7x-4)+90

540=19x+198

540-198=19x

342=19x

342/19=x

x=18

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