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