Question

va rog ex 1 urgentttttttttttt!!!!!!!!!​

Answer 1

c=ciocolate

n=napolitane

$3 \times c \: ..... \: 4 \times n \: ..... \: 10.25 \: lei \\ 7 \times c \: ..... \: 8 \times n \: ..... \: 23.45 \: lei$

Inmultesti fiecare termen din prima relatie cu 2

$6 \times c \: ..... \: 8 \times n \: ..... \: 20.50 \: lei \\ 7 \times c \: ..... \: 8 \times n \: ..... \: 23.45 \: lei$

Scrise in ordine inversa

$7 \times c \: ..... \: 8 \times n \: ..... \: 23.45 \: lei \\ 6 \times c \: ..... \: 8 \times n \: ..... \: 20.50 \: lei$

Le scazi astfel

$1 \times c \: ..... \: 0 \times n \: ..... \: \: 2.95 \: lei$

Rezulta ca

$c = 2.95$

$4 \times n \: + \: 3 \times 2.95 = 10.25 \\ 4 \times n \: + \: 8.85 = 10.25 \\ 4 \times n = 10.25 - 8.85 = 1.40$

$n = 1.40 \div 4 \\ n = 0.35$