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Sagot :

Bonsoir,

a)

3x-x =  6-2

2x = 4

x= 4/2

x= 2

b)

5x-3x = 9-2

2x = 7

x= 7/2

c)

-4-3 = 5x -2x

-7 = 3x

x= -7/3

d)

7x+3x = 1-2

10x = 1

x= 1/10

a)

équation produit nul

soit

2x-1 = 0

2x =  1

x= 1/2

soit

3x+1 = 0

3x=-1

x= -1/3

b)

x-2 = 0

x=2

2x+4 = 0

2x = -4

x= -4/2 = -2

c)

x= 0

3-2x = 0

2x = -3

x= -3/2

d)

5x+1 = 0

5x = -1

x= -1/5

5+x = 0

x = -5

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