20-1.2x=5.6
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20-1.2x+1.2x=5.6+1.2x,
5.6+1.2x=20,
5.6+1.2x-5.6=20-5.6,
12x=14.4,
12x÷12=14.4÷12,
x=1.2;
(2)
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x=
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编辑:chaxungu时间:2026-04-27 13:37:50分类:小学数学题库
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