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The graph of the equation x-7y = -42, in...

The graph of the equation x-7y = -42, intersects the y-axis at `P (alpha, beta)` and the graph of 6x+y-15=0, intersects the x-axis at `Q(gamma, delta)`. What is the value of `alpha+ beta+ gamma +delta` ?
समीकरण x-7y = -42 का आरेख y-अक्ष को `P (alpha, beta)` पर काटता है तथा समीकरण 6x+y-15=0 का आरेख x-अक्ष को `Q(gamma, delta)` पर काटता है | `alpha+ beta+ gamma +delta` का मान क्या है?

A

`17/2`

B

6

C

`9/2`

D

5

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