Explicación paso a paso:
Solución !
#1
[tex] + ( + 25) - ( - 18) - 4 = [/tex]
[tex]25 + 18 - 4 = [/tex]
[tex] = 39[/tex]
#2
[tex] - ( + 30) - ( +12) - 3 = [/tex]
[tex] - 30 - 12 - 3 = [/tex]
[tex] = - 45[/tex]
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Explicación paso a paso:
Hola °
Solución !
#1
[tex] + ( + 25) - ( - 18) - 4 = [/tex]
[tex]25 + 18 - 4 = [/tex]
[tex] = 39[/tex]
#2
[tex] - ( + 30) - ( +12) - 3 = [/tex]
[tex] - 30 - 12 - 3 = [/tex]
[tex] = - 45[/tex]
Atte ° David