有冇人可以教我點計? 2/3(3b+2)-1/6(3b-1) = -3/2 我計來計去的答案都有出入 !!

lung

2006-11-06 6:42 am

2/3(3b+2)-1/6(3b-1) = -3/2

回答 (2)

[匿名]

2006-11-06 6:53 am

✔ 最佳答案

2/3(3b+2)-1/6(3b-1) = -3/2
2b+4/3-1/2b+1/6=-3/2
3/2b+3/2=-3/2
3/2b=-3/2-3/2
3/2b=-3
b=-3*2/3
b=-2

參考: 自己

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用戶83428

2006-11-06 6:47 am

2/3(3b+2)-1/6(3b-1) = -3/2
4(3b+2) - (3b-1) = -9
12b + 8 - 3b + 1 = -9
9b = -18
b = -2

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