A. fold the clothes B. sweep the floor
C. make your bed D. take out the rubbish
E.do the dishes
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一件夹克衫先按成本提高50%标价,再以8折(标价的80%)出售,结果获利20元,若设这件夹克衫的成本是x元,根据题意,可得到的方程是( )