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Ejercicios proporcionados.
Autor :
Jason Aranda
Si x - 7 = 0 ; entonces x = ____________________
Si x + 1 = - 7 ; entonces x = - ____________________
Si x - 8 = - x ; entonces x = ____________________
Si 5x + 5 = 0 ; entonces x = - ____________________
Si x + 9 = 4x ; entonces x = 3