Răspuns:
[tex]a \times 0.25 = b \times 0.2 = k = > a = \frac{k}{ 0.25 } \\ b = \frac{k}{ 0.2 } \\ 3 \times \frac{k}{0.25 } + 2 \times \frac{k}{ 0.2} - 6 = 60 \\ \frac{3k}{0.25} + \frac{2k}{0.2} = 66 \\ 12k + 10k = 66 \\ 22k = 66 \\ k = 3[/tex]
[tex]a = \frac{3}{0.25} \\ a = 12[/tex]
[tex]b = \frac{3}{0.2} \\ b = 15[/tex]
Sper că te-am ajutat! ^^
