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Taking x =\frac{-4}{9}, y \frac{5}{12} \; \text{and}\; z= \frac{7}{18}  ,find :

(a) the rational number which when added to x gives y

(b) the rational number which subtracted from y gives z.

(c) the rational number which when added to z gives us x.

(d) the rational number which when multiplied by y to get x.

(e) the reciprocal of  x + y.

(f) the sum of reciprocals of x and y.

(g) (x ÷ y) × z

(h) (x - y) + z

(i) x + (y + z)

(j) x ÷ (y ÷ z)

(k) x - (y + z)

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