a. $x + \left ( -\frac{1}{5} \right ) = \frac{-4}{15}$ $x = \frac{-4}{15} + \frac{1}{5}$ $x = \frac{-4}{15} + \frac{3}{15}$ $x = \frac{-1}{15}$ |
b. $3,7 - x =\frac{7}{10}$ $x = 3,7 - \frac{7}{10}$ $x = \frac{37}{10} -\frac{7}{10}$ $x = \frac{30}{10} = 3$ |
c. $x . \frac{3}{2} = 2,4$ $x . \frac{3}{2} =\frac{12}{5}$ $x = \frac{12}{5} : \frac{3}{2}$ $x = \frac{12}{5} . \frac{2}{3}$ $x = \frac{8}{5}$ |
d. $3,2 : x = -\frac{6}{11}$ $\frac{16}{5} : x = -\frac{6}{11}$ $x = \frac{16}{5} : \left ( -\frac{6}{11} \right )$ $x = \frac{16}{5} . \frac{-11}{6}$ $x = \frac{-88}{15}$ |