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Sagot :

TEAMCE

Réponse:

Bonjour,

1.

a) 3x+12=4x-4--> 12= x-4--> 16=x

b)x²+2x+5=3x+x²-->2x+5=3x --> 5=x

c)2(4x+8)=8 -->8x+16 = 8-->8x=-8--> x= -1

d)3-x=2-->-x= -1 --> x= 1

e)2x+2=3-->2x = 1 --> x= 1/2 ou x = 0,5

f)(3x-2)/x=4--> 3x-2=4x --> -2=x

bonne journée.

ERRROR404

Bonjour !

a) 3x + 12 = 4x - 4

3x - 4x = -12 - 4

-x = -16

x = 16

b) x² + 2x + 5 = 3x + x²

x² + 2x -3x - x² = -5

-x = -5

x = 5

c) 2(4x + 8) = 8

8x + 16 = 8

8x = 8 - 16

8x = -8

x = -8/8 = -1

d) 3 -x = 2

-x = 2 - 3

-x = -1

x = 1

e) 2x + 2 = 3

2x = 3 -2

2x = 1

x = 1/2 = 0,5

f) (3x -2)/x = 4

3x - 2 = 4x

3x -4x = 2

-x = 2

x = -2

On calcule le produit :

16 × 5 × -1 × 1 × 0,5 × -2 = 80

Bonne journée !

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