Ребята, помогите!!! Это пропорция, нужно найти х

[latex]1)12:3,75= \frac{12}{1}:3 \frac{3}{4}= \frac{12}{1}* \frac{4}{15} = \frac{48}{15} [/latex] [latex]2) \frac{48}{15}-0,2= \frac{48}{15} - \frac{2}{10} = \frac{48}{15} - \frac{1}{5}= \frac{48-3}{15} = \frac{45}{15}=3 [/latex] [latex]3)6 \frac{4}{25}:15 \frac{2}{3} = \frac{154}{25} : \frac{47}{3} = \frac{154}{25}* \frac{3}{47} = \frac{462}{1175} [/latex] [latex]4) \frac{462}{1175} +0,8= \frac{462}{1175} + \frac{4}{5}= \frac{462+940}{1175}= \frac{1402}{1175} [/latex] [latex]5) \frac{3}{1} * \frac{1175}{1402}= \frac{3525}{1402} [/latex] [latex]6)0,016:0,12= \frac{16}{1000} * \frac{100}{12}= \frac{4}{10}* \frac{1}{3}= \frac{4}{30} [/latex] [latex]7) \frac{4}{30} +0,7= \frac{4}{30} + \frac{7}{10} = \frac{4+21}{30} = \frac{25}{30} = \frac{5}{6} [/latex] [latex]8) \frac{5}{6} :x= \frac{5}{6x} [/latex] [latex]6x= \frac{1402*5}{3525} [/latex] [latex]6x= \frac{7010}{3525} [/latex] [latex]x= \frac{7010}{21150} = \frac{701}{2115} [/latex]