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5x + x = 23 + 4 - 9
6x = 18
x = 18/6
x = 3
Solución :
x = 3
9 + 5x - 4 + x = 23
5 + 6x = 23
6x = 23 - 5
6x = 18
x = 18/6
x = 3
Respuesta.
El valor de x es 3