Решите уравнение
8/9=Y/4
1,8/12=7/Z

[tex] \frac{8}{9} = \frac{y}{4} [/tex]
[tex] y=\frac{8}{9}*4[/tex]
[tex]y=\frac{32}{9}[/tex]
[tex]y=3\frac{5}{9}[/tex]

[tex] \frac{1.8}{12} = \frac{7}{z} [/tex]
[tex]z=7: \frac{1.8}{12}[/tex]
[tex]z=7* \frac{12}{1.8}[/tex]
[tex]z= \frac{7*2}{0.3}[/tex]
[tex]z= \frac{14*10}{3}[/tex]
[tex]z= \frac{140}{3}[/tex]
[tex]z=46 \frac{2}{3} [/tex]