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Question

If x+y=6 and 3x−y=4, then x−y is equal to:

A
1
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B
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C
2
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D
4
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Solution

The correct option is A 1

Given, x+y=6 ........(i)

and 3xy=4........(ii)

On adding, we get

4x=10 x=104=52

Thus from (ii), y=1524=72

Hence, xy=5272=1


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