Question

решите пожалуйста два уравнения) ★​

Answer 1

1) 1/6:(1/4х-1/3)-3/8=1/40

1/6:(1/4х-1/3)=1/40+3/8

1/6:(1/4х-1/3)=1/40+15/40

1/6:(1/4х-1/3)=2/5

1/4х-1/3=1/6:2/5

1/4х-1/3=5/12

1/4х=5/12+1/3

1/4х=5/12+4/12

1/4х=9/12

х=9/12:1/4

х=3

2)1/4 : (3/4х-1/2) + 2/5

1/4 : (3/4х - 1/2) = 1/2 + 2/5;

1/4 : (3/4х - 1/2) = 5/10 + 4/10;

1/4 : ( 3/4х - 1/2) = 9/10;

3/4х - 1/2 = 1/4 : 9/10;

3/4х - 1/2 = 1/4 * 10/9;

3/4х - 1/2 = 1/2 * 5/9;

3/4х - 1/2 = 5/18;

3/4х = 5/18 + 1/2;

3/4х = 5/18 + 9/18;

3/4х = 14/18;

3/4х = 7/9;

х = 7/9 : 3/4;

х = 7/9 * 4/3;

х = 28/27;

х = 1 1/27.

Ответ:1 1/27.