Respuesta :

-2 < 2x - 4 < 4...add 4 to all sections
4 - 2 < 2x - 4 + 4 < 4 + 4...simplify
2 < 2x < 8 ...now divide all sections by 2
2/2 < 2/2x < 8/2...simplify
1 < x < 4 <==

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