[tex]1 \frac{2}{15} - \frac{1}{4} \div( 2 \frac{1}{3} + \frac{1}{2} \times 1 \frac{1}{3} ) \\ = \frac{17}{15} - \frac{1}{4} \div ( \frac{7}{3} + \frac{1}{2} \times \frac{4}{3} ) \\ = \frac{17}{15} - \frac{1}{4} \div ( \frac{7}{3} + \frac{4}{6} ) \\ = \frac{17}{15} - \frac{1}{4} \div ( \frac{7}{3} + \frac{2}{3} ) \\ = \frac{17}{15} - \frac{1}{4} \div \frac{9}{3} \\ = \frac{17}{15} - \frac{1}{4} \times \frac{3}{9} \\ = \frac{17}{15} - \frac{3}{36} \\ = \frac{204}{180} - \frac{15}{180} \\ = \frac{189}{180} \\ = \frac{63}{60} \\ = \frac{21}{20}
daca ai nelamuriri scrie-mi in comentarii
