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Help me with the following:

1.the sum of a whole number and its reciprocal is 10/3.what is the number?state a simpler way for solving this problem.

2.if x+1/x =√12,find x-1/x.

3.if 2x+3y=14 and 2x-3y=2,find xy.

4.if x-y=13 and xy=30,find x+y.

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by arjyamaan

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