\(\frac{3x+7}{12} - \frac{x+3}{18} = 1\)
\(\frac{3(3x+7) - 2(x+3)}{36} = 1\)
\(9x + 21 - 2x - 6 = 36\)
\(7x + 15 = 36\)
\(7x = 21\)
\(x = 3\)
\(12x - (5x - 8) = 8 + 7x\)
\(12x - 5x + 8 = 8 + 7x\)
\(7x + 8 = 8 + 7x\)
\(0 = 0\)
Уравнение имеет бесконечное множество решений.