6.252 Решите уравнение: a) 4x + 7x = 1,98; б) 9z 5z = 5,52; в) 2t + 5t + 3,18 = 25,3; г) 8р - 2р - 14,21 = 75,19.

1. а) 4x + 7x = 1,98

   \[11x = 1,98 \] \[x = \frac{1,98}{11} = 0,18\]

2. б) 9z - 5z = 5,52

   \[4z = 5,52 \] \[z = \frac{5,52}{4} = 1,38\]

3. в) 2t + 5t + 3,18 = 25,3

   \[7t = 25,3 - 3,18 = 22,12 \] \[t = \frac{22,12}{7} = 3,16\]

4. г) 8р - 2р - 14,21 = 75,19

   \[6p = 75,19 + 14,21 = 89,4 \] \[p = \frac{89,4}{6} = 14,9\]

Ответ: a) x = 0,18; б) z = 1,38; в) t = 3,16; г) p = 14,9