svp aidez moi Résoudre les équations suivantes : 1) 5x + 3 = 2 2) -4x – 1=0 3) 7x - 5 = 8x + 1 4) 9x - 2 = 11x + 5 5) 3x + 5+ 14x = 7x - 1 6) 8(2x - 1) + 3 = 5(

1) 5x + 3 = 2

5x = 2 - 3

5x = -1

x = -1/5

2) -4x – 1=0

-4x = 1

x = - 1/4

3) 7x - 5 = 8x + 1

7x - 8x = 1 + 5

-x = 6

x = -6

4) 9x - 2 = 11x + 5

9x - 11x = 5 + 2

-2x = 7

x = -7/2

5) 3x + 5+ 14x = 7x - 1

17x - 7x = -1 - 5

10x = - 6

x = -6/10

6) 8(2x - 1) + 3 = 5(x - 1) + 3x​

comme k(a+b) = ka + kb on aura :

16x - 8 + 3 = 5x - 5 + 3x

16x - 8x = -5 +5

8x = 0

x = 0

Bonjour,

Résoudre les équations suivantes :

1) 5x + 3 = 2

5x= 2-3

x= -1/5

S= { -1/5 }

2) -4x – 1=0

-4x= 1

x= -1/4

S= { -1/4 }

3) 7x - 5 = 8x + 1

7x-8x= 1+5

-x= 6

x= -6

S= { -6 }

4) 9x - 2 = 11x + 5

9x-11x= 5+2

-2x= 7

x= -7/2

S= { -7/2 }

5) 3x + 5+ 14x = 7x - 1

17x-7x= -1-5

10x= -6

x= -6/10

x= -3/5

S= { -3/5 }

6) 8(2x - 1) + 3 = 5(x - 1) + 3x

16x-8+3= 5x-5+3x

16x-5= 8x-5

16x-8x= -5+5

8x= .

x= 0

S= { 0 }