Respuesta :

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

jcherry99

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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