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| 3Χ+5Χ=16. |
(1)
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X-15=279,
X-15+15=279+15,
X=294;
(2)
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X=
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(3)3X+5X=16,
8X=16,
8X÷8=16÷8,
X=2.
编辑:chaxungu时间:2026-04-27 13:38:18分类:小学数学题库
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