Question

In 3 butoaie sunt 56hl apa.In primul butoi se afla o cantitate de 7 ori mai mica decat cantitatea totala de apa,iar in al treilea butoi cu 3 hl mai mult decat sfertul celui de-al doilea butoi.Aflati ce cantitate de apa se afla in fiecare butoi?

Answer 1

in 3 butoaie sunt 56 hl apa
a=primul butoi
b=al doilea butoi
c=al treilea butoi
a=56:7
a=8 hl
c=(b:4)-3 hl
8 hl + 3 hl + b + b:4=56 hl
b+b/4=56-11
b+b/4=45
4b/4+b/4=45
5b/4=45
b=45×4/5
b=36
c=36/4+3 hl
c=9+3
c=12
Verificare: 8 hl + 36 hl + 12 hl = 56 hl

Answer 2

a+b+c=56hl
a=56:7
c=(b+3):4
-----------------
a,b,c=?
 a=56:7
a=8
b /---/---/  (pe al doilea segment punem 3)
c /---/---/---/---/
5b=56
b=56:5
b=11 (rest 1)
c=(11 rest 1+3):4
c=14 (rest1):4
c=3.5