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tercera parte de x es x/3
la quinta parte de x es x/5
x/3+x/5+14=x
multiplico por 15, para eliminar fraccionarios
15(x/3)+15(x/5)+14*15=15x
5x+3x+210=15x
210=15x-5x-3x
210=7x
210/7=x
30=x
(5x + 3x)/15 + 14 = x
8x/15 + 14 = x
8x/15 - x = - 14
(8x - 15x)/15 = - 14
- 7x/15 = - 14
- 7x = - 14(15)
- 7x = - 210
x = - 210/- 7
x = 30
Respuesta.
30