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Sagot :
Answer:
20
Step-by-step explanation:
vertical angles are equal. meas. of angle a = meas. of angle b
x=5x-80
x+80=5x
80=4x
20=x
Answer:
A = 80
Step-by-step explanation:
If they are vertical angles, they are equal.
5x - 80 = x Add 80 to both sides
5x - 80 + 80 = x + 80
5x = x + 80 Subtract x from both sides
5x - x = x - x + 80
4x = 80 Divide by 4
4x/4 = 80/4
x = 20
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