Найдите значение х из пропорции:[latex]a) \frac{2x}{3} = \frac{4}{9} b) \frac{x - 3 }{30} = \frac{3}{10} v) \frac{3x}{5} = \frac{9}{10} c) \frac{1}{8} = \frac{3}{2x} d) \frac{8}{15} = \frac{6x}{9} e) \frac{2}{12} = \frac{15}{9...

1)   [latex] \frac{2x}{3} = \frac{4}{9} [/latex] [latex]x= \frac{4*3}{9*2}= \frac{2}{3} [/latex] 2)    [latex] \frac{x-3}{30} = \frac{3}{10} [/latex] [latex]x = \frac{3*30}{10}+3 = 12 [/latex] 3)   [latex] \frac{3x}{5} = \frac{9}{10} [/latex] [latex]x = \frac{5*9}{10*3} =1 \frac{1}{2} [/latex] 4)  [latex] \frac{1}{8}= \frac{3}{2x} [/latex] [latex]x= \frac{8*3}{1*2}=12 [/latex] 5) [latex] \frac{8}{15}= \frac{6x}{9} [/latex] [latex]x= \frac{8*9}{15*6}= \frac{4}{5} [/latex] 6)   [latex] \frac{2}{12} = \frac{15}{9x} [/latex] [latex]x = \frac{12*5}{2*9} = \frac{10}{3}=3 \frac{1}{3} [/latex] 7)  [latex] \frac{12}{13} = \frac{18x}{39} [/latex] [latex]x= \frac{12*39}{13*18}=2 [/latex]