Răspunsuri

2014-10-25T23:27:50+03:00
A+b+c=7500
a+b=5750
b+c=4958

(a+b)+c=7500⇒5750+c=7500⇒c=7500-5750⇒c=1750
a+(b+c)=7500⇒ a+4958=7500⇒a=7500-4958⇒a=2542 
a+b=5750⇒2542+b=5750⇒b=5750-2542⇒b=3208

verificare a+b+c=2542+3208+1750=5750+1750=7500