Question

Помогите решить!!!!!!!!!!!!!!

Answer 1

Ответ:

1) (64/х + 138) - 50 = 90

64/х + 138 = 90 + 50

64/х + 138 = 140

64/х = 140 - 138

64/х = 2

х = 64/2

х = 32

2) 925 - (80/х - 15) = 900

80/х - 15 = 925 - 900

80/х - 15 = 25

80/х = 25 + 15

80/х = 40

х = 80/40

х = 2

3) (95 - 45/х) * 9 = 810

95 - 45/х = 810/9

95 - 45/х = 90

45/х = 95 - 90

45/х = 5

х = 45/5

х = 5

4) 6 * (20/х - 15) = 30

20/х - 15 = 30/6

20/х - 15 = 5

20/х = 15 + 5

20/х = 20

х = 20/20

х = 1

5) (3х - 30)/2 = 68 - 8

(3х - 30)/2 = 60

3х - 30 = 60 * 2

3х - 30 = 120

3х = 120 + 30

3х = 150

х = 150/3

х = 50

6) 720/(4х - 46) = 150 * 3 - 90

720/(4х - 46) = 360

4х - 46 = 720/360

4х - 46 = 2

4х = 46 + 2

4х = 48

х = 48/4

х = 12