Réponse :

Salut ,

5X-19=24X-(3X+13)

5X-19=21-13

5X-21X=-13+19

-16X=6

X=-3/8

6+2(8+6X)-9(3X+4)=0

-14-15X=0

-15X=14

X=-14/15

2X+4+3X/5=2-X-6/10

20X+8+6X=20-X+6

26X+8=26-X

26X+X=26-8

27X=18

X=2/3

7X-14/21-39/52=5X/30

X-2/3-3/4=X/6

X-2/3-X/6=3/4

4(X-2)-2X=9

4X-8-2X=9

2X-8=9

2X=9+8

2/17

3X-7/8-5X-1/16=3-2X/4-1

6X-14-5X+1=12-8X-16

X-13=-4-8X

X+8X=-4+13

9X=9

X=1

Courage !

Explications étape par étape :

Bonjour

5x - 19 = 24x - (3x + 13)

5x - 19 = 24x - 3x - 13

5x - 19 = 21x - 13

21x - 5x = -19 + 13

16x = -6

x = -6/16

x = (-3 * 2)/(8 * 2)

x = -3/8

6 + 2(8 + 6x) - 9(3x + 4) = 0

6 + 16 + 12x - 27x - 36 = 0

-15x - 14 = 0

15x = -14

x = -14/15

2x + (4 + 3x)/5 = 2 - (x - 6)/10

(2x * 10) + 2(4 + 3x) = 2 * 10 - x + 6

20x + 8 + 6x = 20 - x + 6

26x + 8 = 26 - x

26x + x = 26 - 8

27x = 18

x = 18/27

x = (2 * 9)/(3 * 9)

x = 2/3

(7x - 14)/21 - 39/52 = 5x/30

7(x - 2)/(7 * 3) - (3 * 13)/(4 * 13) = 5x/(6 * 5)

(x - 2)/3 - 3/4 = x/6

4(x - 2) - 3 * 3 = 2x

4x - 8 - 9 = 2x

4x - 2x = 17

2x = 17

x = 17/2

(3x - 7)/8 - (5x - 1)/16 = (3 - 2x)/4 - 1

2(3x - 7) - (5x - 1) = 4(3 - 2x) - 16

6x - 14 - 5x + 1 = 12 - 8x - 16

x - 13 = -8x - 4

8x + x = 13 - 4

9x = 9

x = 9/9

x = 1