Answer:
x = 18
Explanation:
130 + 2(5x - 10) + 70 = 360
130 + 10x - 20 + 70 = 360
10x = 180
Given that the two chords are equal,
130 + (5x - 10) + 70 + (5x - 10) = 360
⇒ 180 + 10x = 360
⇒ 10x = 180
⇒ x = 18
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