7.8x减5x等于47.5怎么解方程
7.8x减5x等于47.5怎么解方程
数学人气:537 ℃时间:2019-11-14 01:48:42
优质解答
7.8x- 5x=47.5 2.8x=47.5 x=47.5÷2.8
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