✨ Best Answer ✨
19題的C=7
20題
i=10/32=31.25%
增加了31.25%-12.5%=18.75%
d=32*18.75%=6
剩下回推就行
謝謝您🙇♀️
✨ Best Answer ✨
19題的C=7
20題
i=10/32=31.25%
增加了31.25%-12.5%=18.75%
d=32*18.75%=6
剩下回推就行
謝謝您🙇♀️
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令A=y,C=x,B=19-x-y
2x-3y=8
(19-x-y)/40=5y/40
解聯立得x=7,y=2