Question

un om preistoric are cremene,scoici si melcii,in total 3 350.cremenele si scociile sunt 1 510, scociile si melcii sunt 2 190.Cate bucati are din fiecare?
VA ROG PLIZZZ

Answer 1

c+s+m=3350   (cremene+scoici+melci)
c+s=1510
s+m=2190
1510+m=3350
m=3350-1510
m=1840  melci
c+2190=3350
c=3350-2190
c=1160  cremene
s+1840=2190
s=2190-1840
s=350  scoici
V: 1160+350+1840=3350

Answer 2

a=cremene
b=scoici
c=melci

a+b+c=3350=>1510-c+2190=3350==>3700-c=3550==>c=150

a+c=1510=>a=1510-c=>1510-150=>a=1360

b+c=2190=>b=2190-c=>2190-150=>b=2040

V: 1360+2040+150=3550