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Question

If y=−x−15 and 5y2−37=−x2, then the value of 2x+6y is.

A
95
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B
59
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C
89
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D
149
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Solution

The correct option is B 59
Consider the equations x+y=15...(i)
and 5y2+x2=37 ...(ii)
Multiplying the second equation by 2 gives us 5y+x=74.
Now adding it with equation no (i) gives us 6y+2x=7415=59
6y+2x=59

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