3(2-z)=-9 點計
回答 (4)
2007-10-05 3:43 am
✔ 最佳答案
3(2-z) 9-------- = ------- 首先兩邊都除3
3 3
2-z = -3
2-z+z = -3+z 然後兩邊都+z
2 = -3+z
2+3 = -3+z+3 再兩邊都+3
z = 5
2007-10-04 19:54:59 補充：
第一行應該係3(2-z) -9-------- = --------- 3 3
2007-10-05 3:58 am
3(2-z)=-9
6-3z=-9
-3z=-9-6
-3z=-15
z=5
6-3z=-9
-3z=-9-6
-3z=-15
z=5
2007-10-05 3:38 am
6-3Z=-9
z=-2
z=-2
收錄日期: 2021-04-13 13:45:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071004000051KK03216