a) d= 186-96=90
b=d:5=90:5=18
b=3xc
18=3xc
c=18:3
c=6.
a+b+c+d=186. Inlocuim ce am aflat
a+18+6+90=186
a+114=186
a=186-114
a=72
b) a=180-168=12
b=2xa=2x12=24
c=2xb=2x24=48
Inlocuim rezultatele obtinute in b+c+d=168 si obtinem:
24+48+d=168
72+d=168
d=168-72
d=96
c) a=140-108=32
a, b,c,d sunt consecutive pare inseamna b=34, c=36, d=38.
