Let a and b be two positive real numbers...

Let a and b be two positive real numbers such that at `asqrt(a) + bsqrt(b) = 32` and `asqrt(b) + bsqrt(a) = 31`. What is the value of `(5(a+b))/7` ?

A

5

B

7

C

9

D

Cannot be determined .

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