Question

ПОМОГИТЕ ПОЖАЛУЙСТА ​

Answer 1

Пошаговое объяснение:

4/15х + 2,8 = 6,3 - 3/20х

4/15х + 3/20х = 6,3 - 2,8

16/60х + 9/60х = 3,5

25/60х = 3,5

5/12х = 35/10

х = 35/10 : 5/12

х = 35/10 * 12/5

х =7/5 * 6/1

х = 42/5

х = 8,4 или 8 2/5

5 3/7 - 4х = 3/7 - 1/4х

-4х + 1/4х = 3/7 - 5 3/7

-3 3/4х = -5

-15/4х = -5

х = -5 : (-15/4)

х = 5 * 4/15

х = 20/15

х = 4/3

х = 1 1/3

5 5/12х - 2 3/14 = 5 1/4х - 3 5/7

5 5/12х - 5 1/4х = -3 5/7 + 2 3/14

5 5/12х - 5 3/12х = -3 10/14 + 2 3/14

2/12х = -1 7/14

1/6х = -21/14

х = -21/14 : 1/6

х = -21/14 * 6/1

х = -21/7 * 3/1

х = -63/7

х = -9

4/9(1 1/2х - 3/8) = 1 5/6 - 1 1/3х

4/9(3/2х - 3/8) = 1 5/6 - 1 1/3х

2/3х - 1/6 = 1 5/6 - 1 1/3х

2/3х + 1 1/3х = 1 5/6 + 1/6

2 3/3х = 1 6/6

3х = 2

х = 2 : 3

х = 2/3