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x-
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x=1;
(2)x+3.5×2=12,
x+7=12,
x+7-7=12-7,
x=5;
(3)0.6x-0.5=3.1,
0.6x-0.5+0.5=3.1+0.5,
0.6x=3.6,
0.6x÷0.6=3.6÷0.6,
x=6.
编辑:chaxungu时间:2026-04-27 13:38:12分类:小学数学题库
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