3(2-z)=-9 點計

2007-10-05 3:34 am
請列式 thx thx

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
2007-10-05 3:39 am
3(2-z)=-9
6-3z=-9
3z=-3
3/3z=-3/3
z= -1




希望可以幫到你啦
參考: 我自己
2007-10-05 3:38 am
6-3Z=-9
z=-2


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