Răspuns :
[tex] \frac{2k}{4} - \frac{3k}{9} + \frac{5k}{25} = 60 \\ \\ \frac{k}{2} - \frac{k}{3} + \frac{k}{5} = 60 \\ \\ \frac{11k}{30} = 60 \\ \\ 11k = 60 \times 30 = 1800 \\ \\ k = \frac{1800}{11} [/tex]
simplifici fractiile si iti da:k/2-3/k+5/k=60
11k=1800
k=1800/11
k=163,(63)aprox 164
11k=1800
k=1800/11
k=163,(63)aprox 164