Răspunsuri

2014-03-19T22:29:03+02:00
A+b+c=375
din prob.b=a+15⇒a=b-15
b=c-18⇒c=b+18
inlocuim in a+b+c=375 si ⇒b-15+b+b+18=375
3b+3=375
3b=375-3
3b=372⇒b=372/3⇒b=124
a=b-15=124-15⇒a=109
c=b+18=124+18⇒c=142
109+124+142=375