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pantera1 [17]
2 years ago
10

I don't know how to do this!!​

Mathematics
1 answer:
saw5 [17]2 years ago
6 0
3x-1=77 (due to exterior alternate angle)
Or, 3x=77-1
or, 3x=76
or, x=76/3
or, x=25.3
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