plusieurs calculs x+5=-7 ensuite x-4sur2x+3=2sur3 ensuite 3x-4sur2x+3=3sur2 ensuite 3(2x-4)=2(3x-6)

x=-13

3x-12 = 4x+6 et donc x = -18

6x-8 = 6x+9 donc jamais

6x-12=6x-12 donc pour tout x

x + 5 = -7
x = -7 -5
x = -12

(x - 4) / (2x + 3) = 2 / 3
(x - 4) / (2x + 3) - 2 / 3 = 0
(x - 4) / (2x + 3) - 2(2x + 3) / 3(2x +3) = 0
3(x - 4) / 3(2x + 3) - (4x + 6) / (6x + 9) = 0
(3x - 12 - 4x -6) / (6x + 9) = 0
(-x - 18) / (6x + 9) = 0

-x - 18 = 0. Et 6x + 9 = 0
x = -18. Et 6x = -9
x = -18. Et x = -9 / 6
x = -18. Et x = -3 / 2

X. |. -inf. -18. -3/2. +inf
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-x-18. |. +. O. - |. -
6x+9. |. - |. - ||. +
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Equ. |. - O. +. ||. -


3(2x - 4) = 2(3x - 6)
6x - 12 = 6x - 12
6x - 6x -12 + 12 = 0
0 = 0

Toutes les solutions sont possibles