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Va rogg rapide dau coroanaaaa

Va Rogg Rapide Dau Coroanaaaa class=

Răspuns :

Răspuns:

Explicație pas cu pas:

a)

x/y = 5/13

x = 5y/13

x + y = 5y/13 + y = 5y/13 + 13y/13 = 18y/13

(x + y)/y = (18y/13)/y = 18/13

sau

x/y = 5/13

(x + y)/y = (5 + 13)/13 = 18'13

b)

x/y = 5/13

x = 5y/13

x + y = 5y/13 + y = 5y/13 + 13y/13 = 18y/13

x/(y + x) = (5y/13)/(18y/13) = 5y/13*13/18y = 5/18

sau

x/y = 5/13

x/(y + x) = 5/(13 + 5) = 5/18

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