jandrew3168
26.10.2019 •
Mathematics
In the figure, / is mapped onto / by a 180° rotation. angle b corresponds to which angle in /?
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Ответ:
x=8
Step-by-step explanation:
The angles shown are vertical angles and vertical angles are equal
13x+19 = 16x -5
Subtract 13x from each side
13x-13x+19 = 16x-13x -5
19 = 3x-5
Add 5 to each side
19+5 = 3x-5+5
24 = 3x
Divide by 3
24/3 = 3x/3
8 = x