Question

What should be added to twice the rational no. -5/6 to get -3/4

Answer 1

Here is your answer

let the number be x

2x+(-5/6)= -3/4

2x= -3/4+5/6

2x = -9+10/12

2x= 1/12

X= 1/12*2

X= 1/24

Answer 2

2*-5/6+x=-3/4
-10/6+x=-3/4
X= -3/4+5/3 = 11/12