Ecosey123
07.04.2021 •
Mathematics
Final test need help on this question
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Ответ:
x = 21 degrees
Step-by-step explanation:
Vertical angles are always congruent.
3x + 67 = 130
3x = 130 - 67
3x = 63
x = 21
Ответ:
x=11
Step-by-step explanation:
Using the Exterior Angle Theorem. . .
(3x+8) + (2x+9) = (8x-16)
Solve to get x = 11