I. Решить уравнения: а) 5x = 45; б) 1/2 x = 12; в) 5x = 2/5; г) 7/8 x = 1/8; д) 4x = 2; е) 6x = 1; ж) 5x = 70; з) 8x = 4; и) 10y = 70; к) 100y = 1/100.

1. \(5x=45\Rightarrow x=9\).
2. \(\frac12x=12\Rightarrow x=24\).
3. \(5x=\frac25\Rightarrow x=\frac25:5=\frac{2}{25}\).
4. \(\frac78x=\frac18\Rightarrow x=\frac18\cdot\frac87=\frac17\).
5. \(4x=2\Rightarrow x=\frac12\).
6. \(6x=1\Rightarrow x=\frac16\).
7. \(5x=70\Rightarrow x=14\).
8. \(8x=4\Rightarrow x=\frac12\).
9. \(10y=70\Rightarrow y=7\).
10. \(100y=\frac1{100}\Rightarrow y=\frac1{10000}\).

Ответ: 9; 24; \(\frac{2}{25}\); \(\frac17\); \(\frac12\); \(\frac16\); 14; \(\frac12\); 7; \(\frac1{10000}\).