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Anyone knows this???? Im struggling

Anyone knows this???? Im struggling-example-1

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Answer:

x=42

Explanation:

(n-2)(180)= (6-2)(180)

= 720

(x+81)+(4x-10)+(x+21)+(3x+23)+(5x-60)+(x+35)= 720

15x+90= 720

15x= 630

x= 42

User Amol Challawar
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