4+0.7x=102
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2:
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(1)4+0.7x=102,
4+0.7x-4=102-4,
0.7x=98,
0.7x÷0.7=98÷0.7,
x=140;
(2)
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x=36;
(3)2:
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x=9.
编辑:chaxungu时间:2026-04-27 13:37:46分类:小学数学题库
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