Răspuns :
a+b+c=900
b=3a ⇒a=b/3
b=c-25 ⇒ c=b+25
b/3+b+b+25=900
b+6b+75=2700
7b=2625
b=375
a=375/3=125
c=375+25=400
b=3a ⇒a=b/3
b=c-25 ⇒ c=b+25
b/3+b+b+25=900
b+6b+75=2700
7b=2625
b=375
a=375/3=125
c=375+25=400