Bonjour, pouvez vous m’aider svp, c’est pour lundi

Bonjour,

a=

-4 = x

x = -4

b)

-9-15 = 8x

-24 = 8x

x=  -24/8

x= -3

c)

3x-x = 7 +21

2x =28

x =28/2

x= 14

d)

1/2 - 5/2 = x

-4/2 = x

-2 =x
x =-2

a)

2x+3x  = 15-5

5x = 10

x = 10/5

x = 2

b)

4+1 = -x +6x

5 = 5x

x = 5/5

x = 1

c)

7m -m = -8 -10

6m = -16

m= -16/6

m =  -8/3

d)

-12y +13y = 4

y = 4