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Sagot :

Bonjour,

a)

11x-6x = 18-12

5x = 6

x= 6/5

b)

-2 -9 = -10x + 11x

-11 = x

x = -11

c)

-5x+10x = 13-20

5x = -7

x= -7/5

d)

5x = 19-19

5 x= 0

x= 0

e)

soit

18x+11 = 0

18x = -11

x= -11/18

soit

11x+ 2 =0

11x =-2

x= -2/11

f)

soit

2x-13=0

2x= 13

x= 13/2

soit

9x+2 =0

9x = -2

x= -2/9

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