Question

Помогите пожалуйста​

Answer 1

5х=12,7+6,8

5х=19,5

х=3,9

8,9-2х=1,85

8,90-1,85=2х

7,05=2х

х=3,525

17,9+3х=62,3

3х=62,3-17,9

3х=44,4

х=14,8

7х+1,3х=41,5

8,3х=41,5

х=5

56,7-2,1х=14,7

56,7-14,7=2,1х

42=2,1х

х=20

Answer 2

1)
$5x - 6.8 = 12.7 \\ 5x = 12.7 + 6.8 \\ 5x = 19.5 \\ x = 3.9$
2)
$8.9 - 2x = 1.85 \\ - 2x = 18.5 - 8.9 \\ - 2x = - 7.05 \\ x = 3.525$
3)
$17.9 + 3x = 62.3 \\ 3x = 62.3 - 17.9 \\ 3x = 44.4 \\ x = 14.8$
4)
$7x + 1.3x = 41.5 \\ 8.3x = 41.5 \\ x = 5$
5)
$56.7 - 2.1x = 14.7 \\ - 2.1x = 14.7 - 56.7 \\ - 2.1x = - 42 \\ x = 20$