Question

c+d-8,3при c=9 4/5 d= -1 9/20

Answer 1

c+d-8/3   , c=9 45      d=-1 920
9 45+(-1 920)-83= 5 4160
1) 9 45-1 920=8+(45-920)=8+(4*420-920)=8+720=8 720
2)  8 720-83=8 720-2 23=6 +(720-23)=6+(7*360-2*2060)=6+(2160-4060)=6-1960=5 4160