1 - 3/2 x = 3x + 5 / 2
所以 (3+3/2)x = (1 - 5/2)
所以 9/2 x = - 3/2
所以 x = -1/3
所以 3x + 5 / 2 = 3 * (-1/3) + 5/2 = -1 + 5 / 2 = 3/2
同时还可以验证：1 - 3/2x = 1 - 3/2 * (-1/3) = 1 + 1/2 = 3/2
所以结果是 3/2,即1.5