(2x-1)/5=(9-2x)/3

Решение:

1. \[ \frac{2x - 1}{5} = \frac{9 - 2x}{3} \]
2. \[ 3(2x - 1) = 5(9 - 2x) \]
3. \[ 6x - 3 = 45 - 10x \]
4. \[ 6x + 10x = 45 + 3 \]
5. \[ 16x = 48 \]
6. \[ x = \frac{48}{16} \]
7. \[ x = 3 \]

Ответ: 3