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mamaluj [8]
3 years ago
12

Find the value of X.

Mathematics
2 answers:
ludmilkaskok [199]3 years ago
8 0

Answer:

x=110 i think

Step-by-step explanation:

x+20+2x-70+x+x+20+x+90

=6x+60

6x+60=720

6x=(720-60)

6x=660

660/6=110

x=110

hope this helps!

Marta_Voda [28]3 years ago
4 0

Answer:

Step-by-step explanation:

sum of all angles of polygon = (n-2)*180   {n is no of sides}

= (6-2)*180 = 4*180 = 720

90 + 2x-70 + x+20 +x + x+20 + x = 720

Bring like terms together

90 - 70 + 20 + 20 + 2x + x + x + x + x =720

60 + 6x = 720

6x = 720 - 60

6x = 660

x = 660/6

x = 110

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