解:解方程, 此方程的解为x = 5 x ÷ 8 = 7.5 ÷ 12 x ÷ 8 = (7×10+5)/10 × 1/12 x ÷ 8 = 75/10 × 1/12 x ÷ 8 = 15/2 × 1/12 x ÷ 8 = 5/8 x = 5/8 × 8 ∴x = 5 答:此方程的解为x = 5
12x=8×7.5x=60÷12×=5