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- 4x + 7 = 3x - 7
7 + 7= 4x + 3x
14 = 7x
14/7 = x
2 = x
x = 2
Respuesta.
x = 2
- 4x - 3x = - 7 - 7
- 7x = - 14
x = - 14/-7
x = 2
Solución.
x = 2