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Aïllamos la x (la pasaré a la derecha para que quede positivo):
5 - 2 = x
3 = x
Solución: x = 3
5 - x = 2
Resolvemos :
5 - x = 2
- x = 2 - 5
- x = - 3
x = 3
Respuesta :
x = 3