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Let * be a binary operation on the set of all nonzero real numbers, defined by a * b = ab/5. Find the value of x given that 2 * (x * 5) = 10.

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It is given that a * b = ab/5

So we know that 2 * (x * 5) = 10

We get

2 * ([x × 5]/ 5) = 10

On further calculation

2 * x = 10

So (2 × x)/ 5 = 10

We get x = 25

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