Răspuns :
A+B+C+D=300
B=72
A=72:3=> A=24
C=72X2 =>C=144
INLOCUIM:
24+72+144+C=300
C=300-24-72-144
C=60
B=72
A=72:3=> A=24
C=72X2 =>C=144
INLOCUIM:
24+72+144+C=300
C=300-24-72-144
C=60