Question

what should be added to the sum of 3/-4 and -5/7 to get 9/11​

Answer 1

Answer:

Let x be the required number.

x + 11/18 + (-1/9) = 1

x + 11/18 - 1/9 = 1

x = 1 - 11/18 + 1/9

x = 1 - 11/18 + 2/18

x = 1 - 9/18

x = 1 - 1/2

x = 1/2.