解:解方程, 此方程的解为x = 1/5,【即x = 0.2】 15x = 3 x = 3 ÷ 15 x = 3 × 1/15 x = 3/15 x = 3/(5×3) x = 1/5 ∴x = 0.2 经检验,15 × 0.2 = 3符合题意 答:此方程的解为x = 1/5,【即x = 0.2】