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👨🏻‍🏫 學術台數學

2006-11-26 2:51 am

[(x+0.75)/0.125]-[(x-0.25)/0.25]=15
x=?

回答 (1)

2006-11-26 2:55 am

✔ 最佳答案

[(x+0.75)/0.125]-[(x-0.25)/0.25]=15
x=?
[(x+0.75)/0.125]-[(x-0.25)/0.25]=15
[8(x+3/4)]-[4(x-1/4)]=15
8x+6-4x+1=15
4x+7=15
4x=8
x=2

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