(1)8-
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(2)8(x-2)=2(x+7)(1)8-
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7
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7
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x=12.4;
(2)8(x-2)=2(x+7),
8x-16=2x-14,
8x-16+16=2x+14+16,
8x-2x=2x-2x+30,
6x÷6=30÷6,
x=5.
编辑:chaxungu时间:2026-04-27 13:38:16分类:小学数学题库
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上一篇:(1)Χ-59Χ-49=23(2)65:6=Χ-15.
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