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- 7x - 1 = - 22
- 1 + 22 = 7x
21 = 7x
21/7 = x
3 = x
Respuesta.
x = 3
- 7x = - 22 + 1
- 7x = - 21
x = - 21/-7
x = 3
Solución :
x = 3