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

Va Rog Ex 1 Urgentttttttttttt class=

Răspuns :

c=ciocolate

n=napolitane

[tex]3 \times c \: ..... \: 4 \times n \: ..... \: 10.25 \: lei \\ 7 \times c \: ..... \: 8 \times n \: ..... \: 23.45 \: lei[/tex]

Inmultesti fiecare termen din prima relatie cu 2

[tex]6 \times c \: ..... \: 8 \times n \: ..... \: 20.50 \: lei \\ 7 \times c \: ..... \: 8 \times n \: ..... \: 23.45 \: lei[/tex]

Scrise in ordine inversa

[tex]7 \times c \: ..... \: 8 \times n \: ..... \: 23.45 \: lei \\ 6 \times c \: ..... \: 8 \times n \: ..... \: 20.50 \: lei[/tex]

Le scazi astfel

[tex]1 \times c \: ..... \: 0 \times n \: ..... \: \: 2.95 \: lei[/tex]

Rezulta ca

[tex]c = 2.95[/tex]

[tex]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[/tex]

[tex]n = 1.40 \div 4 \\ n = 0.35[/tex]