Răspuns :
a+b+c=2450
a=250+b⇒b=a-250
a=c+180⇒c=a-180
a+a-250+a-180=2450
3*a=2450+180+250
3*a=2880
a=960
b=a-250
b=960-250
b=710
c=a-180
c=960-180
c=780
a=250+b⇒b=a-250
a=c+180⇒c=a-180
a+a-250+a-180=2450
3*a=2450+180+250
3*a=2880
a=960
b=a-250
b=960-250
b=710
c=a-180
c=960-180
c=780
a+b+c=2450 ; a=b+250=>b=a-250 si a=c+180=>c=a-180, inlocuim =>a+a-250+a-180=2450 => 3a=2450+430 =>a=2880/3 =>a=960 =>b=710 =>c=780