Respuesta:
[tex](7 - 8 + 8 - 9) \div 2 = (7 - 9) \div 2 = ( - 2) \div 2 = - 1[/tex]
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Respuesta:
[tex](7 - 8 + 8 - 9) \div 2 = (7 - 9) \div 2 = ( - 2) \div 2 = - 1[/tex]