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- x + 9 = 13x - 6
- x - 13x = - 6 - 9
- 14x = - 15
x = - 15/-14
x = 15/14-----Respuesta
-15 + 8x - 9x + 24 = -13 -2x + 7 + 15x
-15 + 24 + 13 - 7 = 13x + 9x - 8x
15 = 14x -----> x = 15/14