Решить уровнения: 1)3/7:k=5:2 1/3 2)5.5:8=к:2/11 3)к:5/9=1.8:6 4)20:3.25=4/13:к

1) [latex] \frac{3}{7} [/latex] ÷ k = 5 ÷ [latex] 2\frac{1}{3} [/latex] [latex] \frac{3}{7} [/latex] ÷ k = 5 × [latex] \frac{3}{7} [/latex] k = [latex] \frac{3}{7} [/latex] ÷ [latex] \frac{15}{7} [/latex] k = [latex] \frac{3*7}{7*15} [/latex] k = [latex] \frac{1}{5} [/latex] k = 0,2 2) 5,5 ÷ 8 = k ÷ [latex] \frac{2}{11} [/latex] [latex] \frac{11}{2} [/latex] × [latex] \frac{1}{8} [/latex] = k ÷ [latex] \frac{2}{11} [/latex] k = [latex] \frac{11*2}{16*11} [/latex] k = [latex] \frac{1}{8} [/latex] k = 0,125 3) k ÷ [latex] \frac{5}{9} [/latex] = [latex] 1\frac{4}{5} [/latex] ÷ 6 k ÷ [latex] \frac{5}{9} [/latex] = [latex] \frac{9}{5*6} [/latex] k = [latex] \frac{5*3}{9*10} [/latex] k = [latex] \frac{1}{6} [/latex] 4) 20 ÷ [latex] 3\frac{1}{4} [/latex] = [latex] \frac{4}{13} [/latex] ÷ k [latex] \frac{20*4}{13} [/latex] = [latex] \frac{4}{13} [/latex] ÷ k k = [latex] \frac{4*13}{13*80} [/latex] k = [latex] \frac{1}{20} [/latex] k = 0,05