Question 167963
(2/3)-(5/6)=x-(7/9)
2/3-5/6+7/9=x
x=(2*6-5*3+7*2)/18
x=(12-15+14)/18
x=11/18 ans.
Proof:
2/3-5/6=11/18-7/9
4/6-5/6=11/18-14/18
-1/6=-3/18
-1/6=-1/6