Răspuns :
Răspuns:
a+b+c=100
b=19a
c=5a
a+19a+5a=100
25a=100=>a=100:25=>a=4
___________
a+b+c=168
a=b/6=>b=6a
c=14a
a+6a+14a=168
21a=168=>a=168:21=>a=8
c=14·8=>c=112
____________
a+b+c=174
b=a+6
c=13b=>c=13(a+6)=>c=13a+78
a+a+6+13a+78=174
15a=174-84=>a=90:15=>a=6
c=13·6+78=>c=156
a+c=6+156=>a+c=162