Question

trei elevi au strans impreuna 3688kg de maculatura.cate kg a strans fiecare,daca primii 2 copii au colectat 2345kg,iar ultimii doi 2453kg​

Answer 1

a+b+c=3688

a+b=2345 =>a=2345-b

b+c=2453= >c=2453-b

a+b+c=3688

2345-b+b+2453-b=3688

-b=3688-2345-2453

-b=1343-2453

-b=-1110

b=1110

a=2345-b

a=2345-1110

a=1235

c=2453-1110

c=1343

Answer 2

a+b+c=3688kg
a+b=2345kg
b+c=2453kg
____________
a=? b=? c=?
1) 2453kg-2345kg=108kg (a)
2)3688kg-2345kg=1343kg(c)
3)1343kg+108kg+b=3688kg
1343kg+b=3688kg-108kg
1343kg+b= 3580kg
b=3580kg-1343kg a=108kg
b=2237kg. b=2237kg
c=1343kg
V=108kg+2237kg+1343kg=3688kg