Question

Paula si Ilinca au impreuna 32 castane.1/3 din nr castanelor Paulei reprezinta cat 1/5 din nr
castanelor Ilincai.Cate castane are fiecare fetita?

Prin metoda grafica va rog mult.
Dau coronita pentru cel mai bun raspuns.

Answer 1

a+b=32
a/3=b/5 ⇒ 5a=3b ⇒ a=3b/5
3b/5+b=32 ⇒ 8b=160, b=20, a=12
Paula are 12 castane, Ilinca are 20 castane.

Answer 2

p=paula
i= ilinca
p+i=32 castane
1/3 din 9=1/5 din i
p/3=i/5 => 5p=3I =>> p= 3i/5
=>> p+i=35 => 3i/5+i=32
3i+5i/5=32
8i=160
i=20 castane are ilinca
p+i=32
p+20=32
p=12  castane are paula