www.qrck.net > 3.16x+3.6=67.6解方程

3.16x+3.6=67.6解方程

移项得 3.16x=64 解得 x=1600/79 约等于20.25

16x+3.6=67.6 16x=67.6-3.6 16x=64 x=4

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