Respuesta:
R/ -21
Explicación paso a paso:
30 + [7 + (-65) - (-7)]
30 + [7 - 65 - (-7)]
30 + [7 - 65 + 7]
30 + [-58 + 7]
30 + [-51]
30 - 51
= -21
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Respuesta:
R/ -21
Explicación paso a paso:
30 + [7 + (-65) - (-7)]
30 + [7 - 65 - (-7)]
30 + [7 - 65 + 7]
30 + [-58 + 7]
30 + [-51]
30 - 51
= -21