Найдите значение х из пропорции:

1)    $\frac{2x}{3} = \frac{4}{9}$

$x= \frac{4*3}{9*2}= \frac{2}{3}$

2) $\frac{x-3}{30} = \frac{3}{10}$

$x = \frac{3*30}{10}+3 = 12$

3)    $\frac{3x}{5} = \frac{9}{10}$

$x = \frac{5*9}{10*3} =1 \frac{1}{2}$

4) $\frac{1}{8}= \frac{3}{2x}$

$x= \frac{8*3}{1*2}=12$

5) $\frac{8}{15}= \frac{6x}{9}$

$x= \frac{8*9}{15*6}= \frac{4}{5}$

6)    $\frac{2}{12} = \frac{15}{9x}$

$x = \frac{12*5}{2*9} = \frac{10}{3}=3 \frac{1}{3}$

7) $\frac{12}{13} = \frac{18x}{39}$

$x= \frac{12*39}{13*18}=2$