解:解方程,此方程的解为x = 80 0.3X 除以12等于2 (3/10)x ÷ 12 = 2 (3/10)x = 2 × 12 (3/10)x = 24 x = 24 ÷ 3/10 x = 24 × 10/3 x = 8 × 10 ∴x = 80 答:此方程的解为x = 80
0.3x÷12=20.3x=24x=24÷0.3x=80