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If $8v-3u=5uv \: \: \& \: \: 6v-5u=-2uv$ then $31u+46v$ is:

1. $44$
2. $42$
3. $33$
4. $55$

Divide the equation by uv and then put (1/u=x) and (1/v=y) and solve for x and y. Then put the values in thequestion and you will get the answer.

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