Question

In trei cosuri sunt 75 de mere.Cate mere sunt in fiecare,daca in primele doua sunt 45 mere,iar in ultime doua 50 mere?

Answer 1

a+b+c =75
a+b =45  ;       b+c =50 =>   c =50-b

45+ 50-b =75
b =45+50-75 =20 mere

a+b =45
a+20 =45
a =45-20 =25 mere

c = 50-b =50-20 =30 mere
v  ;    25+20+30 =75 mere