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1???﹥=1???

1?????=1???

1?????=1???

1?????=1???

1????=1???

1???=1???

5??????=1???

1??=1???

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?????﹥+15%??????+20%?????+20%

??????﹥+15%??????+20%????20%

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???????1????=4?﹥+1???=5???

1????=4???+4???=8???

1????=4???+1???=5???

1????=20????=4???

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????2????+2????+1????+10??=2*4*1.15+40*1.2/5+6*1.2+4+10=40

?????3????+1????+1????+10??=3*4*1.15+20*1.2/5+8+10=36.6(?????????37)

?????3????+1????+1????+10??=3*4*1.15+20/5+6*1.2+4+10=39

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