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Community Property Laowang
Solution: Suppose the price rises by X yuan.
(500+X)( 12-X/50)-2 1 * 12 = 5798
6000+ 12X- 10X-X squared /50-252=5798.
300000+ 100X-X squared =302500
X - 100X+2500=0。
(X-50)(X-50)=0
X=50
500+50=550 yuan.
Answer: When the price is set at 550 yuan, the annual income is 5,798 yuan.
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