解:解方程, 此方程的解为x = 193/10,【即x = 19.3】 x减7.5=11.8 x - 7.5 = 11.8 x = 11.8 + 7.5 x = (11×10+8)/10 + (7×10+5)/10 x = 118/10 + 75/10 x = 193/10 ∴x = 19.3 答:此方程的解为x = 193/10,【即x = 19.3】