Răspuns :
Regula de 3 simpla:
1 kg.....................12,4 lei
8,5........................x lei?
1/8,5=12,4/x
x=8,5*12,4/1
x=105,4/1
x=105,4
SAU
1 kg=12,4lei
8,5kg=12,4lei*8,5kg=105,4lei
1 kg.....................12,4 lei
8,5........................x lei?
1/8,5=12,4/x
x=8,5*12,4/1
x=105,4/1
x=105,4
SAU
1 kg=12,4lei
8,5kg=12,4lei*8,5kg=105,4lei