Question

а)5d=-85,6-3d
б)5b - 5b+1=1b+1
    ---   ---       ---      ---
    6     9        2         3 

Answer 1

а) 5d=-85,6-3d

8d+85.6=0

d=-85.6/8

d=-10.7

б) (5b)/6-(5b+1)/9=(1b)/2+1//3

(5//6)b-(5*b/9+1/9)-b/2-(1//3)=0

(5//6)b-((5//9)b+(1//9))-b/2-(1//3)=0

(5//18)b-(1//9)-b/2-(1//3)=0

-(2//9)b-(1//9)-(1//3)=0

-(2//9)b-(4//9)=0
b=(4//9)/(-(2//9))
b=-2

// - черта дроби