Question

Sandu are de 4 ori mai multe nuci decat Daniela, iar Ileana are de 5 ori mai multe nuci decat Daniela. Impreuna au 130 nuci. Cate are fiecare (Probleme cu ajutorul ecuatiilor)

Answer 1

S = Sandu
D = Daniela
I = Ileana

S + D + I = 130

S = 4D
I = 5D

4D + D + 5D = 130
10D = 130 | : 10
D = 13

S = 4D
S = 4 × 13
S = 52

I = 5D
I = 5 × 13
I = 65

VERIFICARE : 13 + 65 + 52 = 130

Answer 2

s+d+i=130
s=4×d
i=5×d
4×d+d+5×d=130
10d=130
d=130:10
d=13(nuci Daniela)
s=4×13=52(nuci Sandu)
i=5×13=65(nuci Ileana)