题目内容
已知
=
=
,则
=______.
| a |
| 5 |
| b |
| 3 |
| c |
| -2 |
| 2b |
| a+3b-c |
∵
=
=
,
∴5b=3a,-2b=3c,
即a=
b,c=-
b,
则
=
=
.
故答案为:
.
| a |
| 5 |
| b |
| 3 |
| c |
| -2 |
∴5b=3a,-2b=3c,
即a=
| 5 |
| 3 |
| 2 |
| 3 |
则
| 2b |
| a+3b-c |
| 2b | ||||
|
| 3 |
| 8 |
故答案为:
| 3 |
| 8 |
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