Ответ:

  1. \(\frac{4}{9}x=3.6\);
    \(x=3.6:\frac{4}{9}=3.6\cdot\frac{9}{4}=8.1\).
  2. \(4\frac{2}{7}x=1\);
    \(\frac{30}{7}x=1\);
    \(x=1:\frac{30}{7}=\frac{7}{30}\).

Ответ: 1) \(x=8,1\); 2) \(x=\frac{7}{30}\).