Explicație pas cu pas:
17.a)
[tex]x \times (- \frac{28}{45}) = \frac{35}{27} \\ x = - \frac{35 \times 45}{27 \times 28} \\ x = - \frac{25}{12} [/tex]
b)
[tex]x \div 1 \frac{2}{17} = - 3\frac{2}{5} \\ x \times \frac{17}{19} = -\frac{17}{5} \\ x = - \frac{17}{5} \times \frac{19}{17} \\ x = - \frac{19}{5} = -3\frac{4}{5} [/tex]
c)
[tex]x \div (- \frac{21}{220}) = - 5 \frac{5}{42} \\ x \times \frac{220}{21} = \frac{215}{42} \\ x = \frac{215 \times 21}{42 \times 220} \\ x = \frac{43}{88} [/tex]
