3 x + 4 / 5 = 2解: 3 x = 2 - 4 / 5 3 x = 6 / 5 x = 6 / 5 ÷ 3 x = (6 ÷ 3)/ 5 x = 2 / 5
3x=2减去五分之四=五分之六那么x=五分之六除以3=五分之二
3x=2-4/5=6/5故x=(6/5)/3=2/5
3x=2-0.83x=1.2x=0.4
3x=2-4/53x=6/5x=2/5