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12:
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60%X-18=72.
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x=56;
(2)12:
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x=10;
(3)60%X-18=72,
0.6x-18+18=72+18,
0.6x=90,
0.6x÷0.6=90÷0.6,
x=150.
编辑:chaxungu时间:2026-04-27 13:38:20分类:小学数学题库
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