Question

35. Решите 1) + x уравнение: 4 9 1 2 1-x 2) 2 1 1 12 3 1-x 5 x 3) 1 2 1 x 1 1 x 4​ СРОЧНО ДАМ 100 БАЛОВ

Answer 1

Пошаговое объяснение:

1)

1/х + 1/(1 2/7х) = 4/9

1 2/7 / 1 2/7х + 1/1 2/7х = 4/9

(1 2/7 + 1)/1 2/7х = 4/9

2 2/7 / 1 2/7х = 4/9

4 * 1 2/7х = 9 * 2 2/7

4 * 9/7х = 9 * 16/7

36/7х = 144/7

х = 144/7 : 36/7

х = 144/7 * 7/36

х = 4/1 * 1/1

х = 4/1

х = 4

2)

2/1 3/5х - 1/х = 1/12

2/1 3/5х - (1 3/5)/1 3/5х = 1/12

(2 - 1 3/5)/ (1 3/5х) = 1/12

2/5 / 1 3/5х = 1/12

1 3/5х * 1 = 2/5 * 12

1 3/5х = 24/5

8/5х = 24/5

х = 24/5 : 8/5

х = 24/5 * 5/8

х = 3/1 * 1/1

х = 3/1

х = 3

3)

2/(1 1/3х) - 1/х = 1/4

2/(1 1/3х) - (1 1/3)/(1 1/3х) = 1/4

(2 - 1 1/3)/1 1/3х = 1/4

2/3 / 1 1/3х = 1/4

1 1/3х * 1 = 2/3 * 4

1 1/3х = 8/3

4/3х = 8/3

х = 8/3 : 4/3

х = 8/3 * 3/4

х = 2/1 * 1/1

х = 2/1

х = 2