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The value of lambda for which the lines ...

The value of `lambda` for which the lines `3x+4y=5,5x+4y=4\ a n d\ lambdax+4y=6` meet at a point is `2` b. `3` c. `1` d. `4`

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It is given that the lines `3 x+4 y=5,5 x+4 y=4 `and `\lambda x+4 y=6` meet at a point.
In other words, the given lines are concurrent.
`[[3 , 4 ,-5 ],[5 , 4 , -4] ,[\lambda , 4, -6]]=0`
...
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