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科目:小学数学 来源: 题型:
| (1)30%X=70 | X-60%=170 | 50%X-29%=34 | ||
| (2)80%X=120 | 5(x-9)=400 | 87.5%x=50 | ||
| (3)120X-20X=40 | X+130%X=460 | X+
|
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