6.252 Решите уравнение: a) 4x + 7x = 1,98; б) 92 5z = 5,52; в) 2t + 5t + 3,18 = 25,3; г) 8р - 2р - 14,21 = 75,19.

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Решаем:

1. a) 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; 7t = 22,12; \[ t = \frac{22,12}{7} = 3,16 \]
4. г) 8p - 2p - 14,21 = 75,19; 6p = 75,19 + 14,21; 6p = 89,4; \[ p = \frac{89,4}{6} = 14,9 \]

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