Question

БУДЬ ЛАСКА ДОПОМОЖІТЬ
1) 1/4x+1/x=3/8
2) 1/x+ 1/3/4/x=7/12
ось фото

Answer 1

Ответ:

1/(4х) + 1/х = 3/8

1/(4х) + 4/(4х) = 3/8

5/(4х) = 3/8

4х = 5 : 3/8

4х = 5 * 8/3

4х = 40/3

х = 40/3 : 4

х = 40/3 * 1/4

х = 40/12

х = 10/3

х = 3 1/3

1/х + 1/(3/4х) = 7/12

(3/4)/(3/4х) + 1/(3/4х) = 7/12

(1 3/4)/(3/4х) = 7/12

3/4х = 1 3/4 : 7/12

3/4х = 7/4 * 12/7

3/4х = 1/1 * 3/1

3/4х = 3

х = 3 : 3/4

х = 3 * 4/3

х = 12/3

х = 4