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stiind ca x/y=7/9,determinati valorile rapoartelor urmatoare
5x+2y/2x-y si x+8y/3x+6y


Răspuns :

x=7y/9
[tex] \frac{ \frac{35y}{9} +2y}{ \frac{14y}{9} -y} = \frac{35y+18y}{14y-9y} = \frac{53}{5} [/tex]
[tex] \frac{ \frac{7y}{9} +8y}{ \frac{21y}{9} +6y} = \frac{7y+72y}{21y+54y} = \frac{79}{75} [/tex]