Por favor resolver estas ecuaciones de primer grado : doy 10 puntos! 1. 2x + 2 : 6 2. 3 (2x + 3) : 4x + 6 3. 8x + 4x - 3 : x + 5 4. 6 (x + 2) + 3x : 2 (x - 1) - 2 5. 2x - 13 : 1 6. 5 - x sobre 4 - 5 + x sobre 5 : 1 - x sobre 4 + 1.
En resumen
1. - 2x + 2 = 6 2x = 6 - 2 2x = 4 x = 4 / 2 x = 2 2. - 3(2x + 3) = 4x + 6 6x + 9 = 4x + 6 6x - 4x = 6 - 9 2x = - 3 x = - 3 / 2 3. - 8x + 4x - 3 : x + 5 12x - x = 5 + 3 11x = 8 x = 8 / 11 4.
1. - 2x + 2 = 6 2x = 6 - 2 2x = 4 x = 4 / 2 x = 2
2.
- 3(2x + 3) = 4x + 6 6x + 9 = 4x + 6 6x - 4x = 6 - 9 2x = - 3 x = - 3 / 2
3.
- 8x + 4x - 3 : x + 5 12x - x = 5 + 3 11x = 8 x = 8 / 11
4.
6 (x + 2) + 3x : 2 (x - 1) - 2 6x + 12 + 3x = 2x - 2 - 2 9x - 2x = - 12 - 4 7x = - 16 x = - 16 / 7
5.
2x - 13 : 1 2x = 14 x = 7.