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2) - 9x - x + 1 = 2x + 6
2) - 3x + 10 = - 2x + 3
4) x + 3x = 18 + 2
5) - 7x + 8 = - 2x + 3
- 5x + 11 = - 6x + 9
- 5x + 6x = 9 - 11
x = - 2
Comprobación.
- 5x + 11 = - 6x + 9
- 5(- 2) + 11 = - 6(- 2) + 9
10 + 11 = 12 + 9
21 = 21
Respuesta.
x = - 2
Ejemplos.
4x + 10 = 2x - 14
15 + 2x + 5 = 3x
25x - 35 - 10x = 5x + 15
8x + 16 = 2x + 10
6x + 42 + x = 84