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Ecuación 1°er grado.
3x + 2 = 1 - 5x
3x + 5x = 1 - 2
8x = - 1
x = - 1/8
.................................................................
3x + 2 = 5x - 1
3x - 5x = - 1 - 2
- 2x = 3
2x = - 3
x = - 3/2.