ANSWER: x = 27
EXPLANATION: 2 angles opposite from each other at the vortex are equal. You would set these equations equal to each other.
1. set them equal to each other.
1. (4x+7) = [5(x+l-4)].
2. Distribute the 5
2. (4x+7) = (5x-20)
3. isolate the variable (add 20 to 7)
3. 4x + 27 = 5x
4. combine the x’s (subtract 4x from 5x)
4. 27 = x
Now, to be 100% sure of your answer, fill in the x’s.
4(27) + 7 = 5[(27)-4]
108 + 7 = 5[23]
115 = 115