monica2271
monica2271
17-01-2021
Mathematics
contestada
Here is an easy one
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hayley554
hayley554
17-01-2021
Remember that the angles of a triangle is 180 so:
(7x+8) + (5x+2) + (7x-1) = 180
7x+8+5x+2+7x-1=180
7x+5x+7x=180-8-2+1
19x=171
X= 171/19
X=9
Therefore x=9
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Аноним
Аноним
20-02-2021
Answer:
9
Step-by-step explanation:
done in other question of yours
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