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a fost răspuns

Razvan a rezolvat in 7 zile 105 probleme. In cate zile rezolva 150 de probleme, daca ritmul zilnic e acelasi?

Răspuns :

Danamocanu71
7/y=105/150
⇒y=7·150/105
⇒y=150/15
⇒y=10[zile];
7 zile ......................... 105 probleme 
x zile ......................... 150 probleme
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[tex] \frac{7}{x} [/tex]  =  [tex] \frac{105}{150} [/tex]

x = [tex] \frac{7 * 150 }{105} [/tex]

x = [tex] \frac{1050}{105} [/tex]

x = 10 zile