530. Решите уравнение: a) 15x = 0,15; б) 3,08 : у = 4; в) За + 8а = 1,87; г) 7z - 3z = 5,12; д) 2t + 5t + 3,18 = 25,3; e) 8p - 2p - 14,21 = 75,19; ж) 295,1 : (п - 3) = 13; з) 34 (m + 1,2) = 61,2; и) 15 (к – 0,2) = 21.

Ответы: a) x = 0,01; б) y = 0,77; в) a = 0,17; г) z = 1,28; д) t = 3,16; e) p = 14,9; ж) n = 25,7; з) m = 0,6; и) k = 1,6

1. a) \(15x = 0.15\)
\[x = \frac{0.15}{15} = 0.01\]
2. б) \(3.08 : y = 4\)
\[y = \frac{3.08}{4} = 0.77\]
3. в) \(3a + 8a = 1.87\)
\[11a = 1.87\] \[a = \frac{1.87}{11} = 0.17\]
4. г) \(7z - 3z = 5.12\)
\[4z = 5.12\] \[z = \frac{5.12}{4} = 1.28\]
5. д) \(2t + 5t + 3.18 = 25.3\)
\[7t = 25.3 - 3.18\] \[7t = 22.12\] \[t = \frac{22.12}{7} = 3.16\]
6. e) \(8p - 2p - 14.21 = 75.19\)
\[6p = 75.19 + 14.21\] \[6p = 89.4\] \[p = \frac{89.4}{6} = 14.9\]
7. ж) \(295.1 : (n - 3) = 13\)
\[n - 3 = \frac{295.1}{13}\] \[n - 3 = 22.7\] \[n = 22.7 + 3 = 25.7\]
8. з) \(34 \cdot (m + 1.2) = 61.2\)
\[m + 1.2 = \frac{61.2}{34}\] \[m + 1.2 = 1.8\] \[m = 1.8 - 1.2 = 0.6\]
9. и) \(15 \cdot (k - 0.2) = 21\)
\[k - 0.2 = \frac{21}{15}\] \[k - 0.2 = 1.4\] \[k = 1.4 + 0.2 = 1.6\]

Ответы: a) x = 0,01; б) y = 0,77; в) a = 0,17; г) z = 1,28; д) t = 3,16; e) p = 14,9; ж) n = 25,7; з) m = 0,6; и) k = 1,6