[tex] \frac{2}{3} x = 46 \\ \frac{2x}{3} = 46 \\ 2x = 46 \times 3 \\ 2x = 138 \\ x = 69[/tex]
[tex] \frac{1}{5} x - 1.3 = 1 \\ \frac{x}{5} - \frac{13}{10} = 1 \\ \frac{2x}{10} - \frac{13}{10} = 1 \\ 2x - 13 = 10 \\ 2x = 23 \\ x = \frac{23}{2} = 11.5[/tex]
[tex]3.6 \div x = 1.2 \\ \frac{36}{10} \times \frac{1}{x} = \frac{12}{10} \\ \frac{18}{5x} = \frac{6}{5} \\ 18 \times 5 = 6 \times 5x \\ 90 = 30x \\ = > x = 3[/tex]
