Решение:
а) \(0,3x + 11 = 2\)
- \(0,3x = 2 - 11\)
- \(0,3x = -9\)
- \(x = \frac{-9}{0,3}\)
- \(x = -30\)
б) \(5 - x = 1 + 5x\)
- \(-x - 5x = 1 - 5\)
- \(-6x = -4\)
- \(x = \frac{-4}{-6}\)
- \(x = \frac{2}{3}\)
в) \(7 - 2(x + 3) = 13 – 6x\)
- \(7 - 2x - 6 = 13 - 6x\)
- \(1 - 2x = 13 - 6x\)
- \(-2x + 6x = 13 - 1\)
- \(4x = 12\)
- \(x = 3\)
г) \(4(х – 0,5) – 2(x + 0,3) = -2,6\)
- \(4x - 2 - 2x - 0,6 = -2,6\)
- \(2x - 2,6 = -2,6\)
- \(2x = -2,6 + 2,6\)
- \(2x = 0\)
- \(x = 0\)
Ответ: а) -30; б) \(\frac{2}{3}\); в) 3; г) 0.