Question

Б) 14-72:(D-3)=8.........

Answer 1

14-72:(D-3)=8,d≠3

14-72:D-3=8

-72:D-3=8-14

-72:D-3=-6

72=(D-3)×6

72=6D-18

-6D=-18-72

-6D=-90

D=15,D≠3

D=15