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数学
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解方程.
8.1x-4.5x=7.92
4x+17=27.
人气:491 ℃ 时间:2019-10-25 12:24:27
解答
(1)8.1x-4.5x=7.92
3.6x=7.92
3.6x÷3.6=7.92÷3.6
x=2.2;
(2)4x+17=27
4x+17-17=27-17
4x÷4=10÷4
x=2.5.
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