[tex] a) \: \frac{a}{3} = \frac{5}{b} \\ a \times b = 3 \times 5 = > a \times b = 15 \\ 30 + \frac{150}{a \times b} = 30 + \frac{150}{15} = 30 + 10 = 40 \\ b) \: \frac{a}{4} = \frac{8}{b} = > \: a \times b = 4 \times 8 = > a \times b = 32 \\ \frac{2}{c} = \frac{d}{16} = > c \times d = 2 \times 16 = > c \times d = 32 \\ a \times b - c \times d = 32 - 32 = 0[/tex]
Sper ca te-am ajutat !!
