题目内容
已知
=
=
=
,且2b-d+5f≠0,则
=______.
| a |
| b |
| c |
| d |
| e |
| f |
| 5 |
| 7 |
| 2a-c+5e |
| 2b-d+5f |
∵
=
=
=
,
∴a=
b,c=
d,e=
f,
∴
=
=
×1=
.
故答案是
.
| a |
| b |
| c |
| d |
| e |
| f |
| 5 |
| 7 |
∴a=
| 5 |
| 7 |
| 5 |
| 7 |
| 5 |
| 7 |
∴
| 2a-c+5e |
| 2b-d+5f |
2×
| ||||||
| 2b-d+5f |
| 5 |
| 7 |
| 5 |
| 7 |
故答案是
| 5 |
| 7 |
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