解:解方程, 此方程的解为x = 4/7 (7/2)x × 5/2 ÷ 5/4 - 1 = 3 (7/2)x × 5/2 × 4/5 = 3 + 1 (7/2)x × 2 = 4 7x = 4 x = 4 ÷ 7 x = 4 × 1/7 ∴x = 4/7 答:此方程的解为x = 4/7