Question

13/20+(3/5+x) =5/6

Answer 1

\(\dfrac{13}{20}+\left(\dfrac{3}{5}+x\right)=\dfrac{5}{6}\) 
       
               \(\dfrac{3}{5}+x=\dfrac{5}{6}-\dfrac{13}{20}\) 
 
               \(\dfrac{3}{5}+x=\dfrac{11}{60}\) 

                       \(x=\dfrac{11}{60}-\dfrac{3}{5}\) 
 

                       \(x=-\dfrac{5}{12}\)

Answer 2

=>x+3/5=5/6-13/20=50/60-39/60=11/60

=>x=11/60-36/60=-25/60=-5/12