Question

a:b=3 b:2=c a-b=40 află 3a-4b+5c

Answer 1

(3-4+5)x(a-b+c)=
4x(40-c)=
160-4c=
160-4x(b-2)=
160-4b-8=
160-8=-4b
-b=-(40-2)=
-b=-38/x-1=
b=38

a-38=40=>a=78

3x78-4x38+5c=
234-152+5c=
5c=82
c=16,4

234-152+16,4=98,4