B.translate each in the form y=k/x, where k is constant.

1.the difference of x and y varies inversely as the sum of n and m

2.One-thrid of the product of a and b varies inversely as the quotient of s and t.

3.two-thirds of a certain number(n) varies inversely as the reciprocal of another number (m).

4. Twice the product of the sum and difference of a and b varies inversely as the quotient of c and d

5. Seven less than twice a number varies inversely as thrice the same number.​