2. 2/3(3b+2)-1/6(3b-1)=-1 1/2
更新1:
/前係分子啊!!!
方程式來計計!!!
回答 (2)
2006-10-20 5:18 am
✔ 最佳答案
1. s+1/3+s-1/7=-6
2s=-6-1/3+1/7
2s=(-126-7+3)/21
2s=-130/21
s=-65/21
2. 2/3(3b+2)-1/6(3b-1)=-1 1/2
6*(2/3(3b+2)-1/6(3b-1)=6*(-3/2)
4(3b+2)-(3b-1)=-9
12b+8-3b+1=-9
9b=-9-8-1
9b=-18
b=-2
2006-10-20 5:16 am
1. s+1/3+s-1/7=-6
s(1/3-1/7)=-6
4/21s=-6
s=-32/2
s(1/3-1/7)=-6
4/21s=-6
s=-32/2
收錄日期: 2021-04-24 08:24:14
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