The original tickets for Century Park were 10 yuan each, but later the tickets were sold at a reduced price. After the price cut, because the audience doubled, the income increased by 20%. How much is each ticket after the price reduction?
世纪公园原来门票每张10元，后来门票降价出售．降价后，由于观众增加1倍，收入反而增加20%．降价后每张门票多少元？
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