Question

помогите пж даю 15 баллов

Answer 1

а)3х-15,6=0

3х=15,6

х=5,2

б)8х+2=3х-18

8х-3х= -18-2

5х= -20

х= -4

в)2х-(1+9х)=20

2х-1-9х=20

2х-9х=20+1

-7х=21

х= -3

Answer 2

a) 3x- 15,6 = 0
3x = 15,6
x= 15,6 : 3
x= 5 ,2


b) 8x+2 = 3x- 18
8x -3x= -18 - 2
5x = -20
x = - 20 :5
x = - 4

w) 2x - (1+9x) = 20
2x - 1 - 9x = 20
2x - 9x = 20 +1
- 7x = 21
x = 21 : ( - 7)
x = - 3