x+2/5x=14/15

问题描述:

x+2/5x=14/15

3/7X1/4÷3/4 =3/7X1/4X4/3 =1/7 (3/8+2/3)X36 =3/8X36+2/3X36 =37.5 7/5X2/3+14/15÷1/9 =14/15+14/15X9 =14/15(1