Prima etapa :1/5d+6
Rest1:4/5d-6
A doua etapa:[(4/5d-6)/2]-10
Rest2:[(4/5d-6)/2]+10
A treia etapa:2/3{[(4/5d-6)/2]+10}+9
Rest 3 :1/3{[(4/5d-6)/2]+10}-9=0 (pentru ca Rest 3=0(nu ii mai ramane de parcurs))
1/3{[(4/5d-6)/2]+10}=9 /inmultesti cu 3
[(4/5d-6)/2]+10=27
(4/5d-6)/2=17
4/5d-6=34
4/5d=40
d=50
Spor la teme :* !