2x+18.5=7x+3.5
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答案2.9解:2x+18-2x=7x+3.5-2x,18=5x+3.5,18-3.5=5x+3.5-3.5,14.5=5x,5x=14.5,5x➗5=14.5➗5,x=2.9
咨询记录 · 回答于2023-01-06
2x+18.5=7x+3.5
你好,麻烦快点,
答案2.9解:2x+18-2x=7x+3.5-2x,18=5x+3.5,18-3.5=5x+3.5-3.5,14.5=5x,5x=14.5,5x➗5=14.5➗5,x=2.9
好,谢谢
答案2.9,x=2.9解:2x+18-2x=7x+3.5-2x,18=5x+3.5,18-3.5=5x+3.5-3.5,14.5=5x,5x=14.5,5x➗5=14.5➗5,x=2.9方程的解是x=2.9
利用等式的性质解方程
谢谢,快,急用,要发给别人,
修改一下,x=3
答案3,x=3解:2x+18.5-2x=7x+3.5-2x,18.5=5x+3.5,18.5-3.5=5x+3.5-3.5,15=5x,5x=15,5x➗5=15➗5,x=3方程的解是x=3