Bonhour quelqu un peut m aider a mon exercice de math merci

bonjour

5 x + 3 x = 8 x

5 x - 3 x  = 2 x

- 5 x +3 x = - 2 x

- 5 x - 3 x = - 8 x

11 t² - 9 t² = 2 t²

- 18 u² + 29 u² = 11 u²

14 v³ + 23 v ³ = 37 v ³

18 u² - 29 u² = - 11 u²

5 x + 4 x - 5 t = 9 x - 5 t

- 3 y + 8 u - 5 y = - 8 y + 8 u

5 x + 4 x - 5 x² = 9 x - 5 x²

8 xy - 7 xy = xy

5 ab - 9 ab + ab = - 3 ab

a ³ + a ³ + a ³ = 3 a ³

1/2 x + 1 /2 x = 2 /2 x = x

Bonjour,

5x + 3x = 8x

5x - 3x = 2x

- 5x + 3x = - 2x

- 5x - 3x = - 8x

11t² - 9t² = 2t²

- 18u² + 29u² = 11u²

14v³ + 23v³³ = 37v³

18u² - 29u² = - 11u²

5x + 4x  5t = 9x - 5t

- 3y + 8u - 5y = - 8y + 8u

5x + 4x - 5x² = 5x² + 9x

8xy - 7xy = xy

5ab - 9ab + ab = - 3ab

a³ + a³ + a³ = 3a³

1/2x + 1/2x = 2/2x = x