Question

3 si 4 urgent dau 5 stele

Answer 1

$3) \\ \\ 7 - 2 \frac{1}{3} - 3 \frac{4}{5} = 7 - \frac{7}{3} - \frac{19}{15} = \frac{13}{15} \\ \\ 2 \frac{5}{15} + 3 \frac{1}{18} - 4 \frac{1}{6} = \frac{1}{3} + \frac{55}{18} - \frac{25}{6} = \frac{11}{9} = 1 \frac{2}{9} \\ \\ \frac{10}{16} + 1 \frac{6}{15} - \frac{3}{30} - \frac{15}{100} = \frac{5}{8} + \frac{7}{5} - \frac{1}{10} - \frac{3}{20} = \frac{71}{40} = 1 \frac{31}{40} \\ \\ \frac{16}{36} + 2 \frac{7}{21} - \frac{6}{36} - \frac{7}{30} = \frac{4}{9} + \frac{7}{3} - \frac{1}{6} - \frac{7}{30} = \frac{107}{45} = 2 \frac{17}{45} \\ \\ \frac{35}{120} + \frac{21}{27} - \frac{25}{90} = \frac{7}{24} + \frac{7}{9} - \frac{5}{18} = \frac{19}{24} \\ \\ 4) \\ \\ \frac{1}{12} + \frac{3}{16} + \frac{7}{24} = \frac{9}{16} \\ \\ \frac{9}{16} = \frac{9}{16} \\ \\ 0 = \frac{9}{16} - \frac{9}{16} \\ \\ 0 = 0=>Are \: solutii \\ \\ \frac{1}{24} + \frac{2}{42} + \frac{11}{56} = \frac{13}{42} \\ \\ \frac{1}{24} + \frac{1}{21} + \frac{11}{56} = \frac{13}{42} \\ \\ \frac{2}{7} = \frac{13}{42} \\ \\ 0 = \frac{13}{42} - \frac{2}{7} \\ \\ 0 = \frac{1}{42} = > Nu \: are \: solutii \\ \\ \frac{1}{6} + ( \frac{1}{18} + \frac{1}{24}) = (\frac{1}{6} + \frac{1}{18}) + \frac{1}{24} \\ \\ \frac{19}{72} = ( \frac{2}{9}) + \frac{1}{24} \\ \\ \frac{19}{72} = \frac{19}{72} \\ \\ 0 = \frac{19}{72} - \frac{19}{72} \\ \\ 0 = 0 = > Are \: solutii \\ \\ \frac{5}{9} + \frac{1}{12} + \frac{7}{18} = 1 + \frac{1}{36} \\ \\ 1 \frac{1}{36} = \frac{37}{36} \\ \\ 1 \frac{1}{36} = 1 \frac{1}{36} \\ \\ 0 = 1 \frac{1}{36} - 1 \frac{1}{36} \\ \\ 0 = \frac{37}{36} - \frac{37}{36} \\ \\ 0 = 0 = > Are \: solutii$