Пункт В,желательно побыстрее)

[latex]3 \frac{1}{3}- \frac{2}{3}x-1.7=3.9x [/latex] [latex]3 \frac{1}{3}- \frac{2}{3}x-1 \frac{7}{10} =3 \frac{9}{10} x [/latex] [latex]- \frac{2}{3}x-3 \frac{9}{10} x=1 \frac{7}{10} -3 \frac{1}{3} [/latex] [latex]- \frac{2}{3}x- \frac{39}{10} x= \frac{17}{10} - \frac{10}{3}[/latex] [latex]- \frac{20}{30}x- \frac{117}{30}x= \frac{51}{30}- \frac{100}{30} [/latex] [latex]- \frac{137}{30 } x=- \frac{49}{30} [/latex] [latex]x=- \frac{49}{30}:(- \frac{137}{30} ) [/latex] [latex]x= \frac{49*30}{30*137} [/latex] [latex]x= \frac{49}{137} [/latex]