Question

am 71 de pasari rate gaini si curcani.daca nr gainilor este cu 25 mai mare decat nr ratelor care sunt 18 cate pasari de fiecare fel am?

Answer 1

r-rate
g-gaini
c-curcani
g=r+25=>g=18+25=43
c=71-(18+43)=>c=71-61=>c=10

Answer 2

r+g+c=71 pasari
r=18
g=r+25
----------------------
r=18;g=? c=?

g=18+25
g=43

   r+ g+c=71
18+43+c=71
r+g=18+43
r+g=61
61+c=71
71-61=10 c
c=10

  r + g + c =71
18+43+10=71

R=> r=18
       g=43
       c=10