Ayudaaaaaaaaaaaaaa no entiendo Doy coronaaaaaaaaaa al que me ayude
-4/7-5/21=
-4/7-5/21=
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procedimiento :
[tex]-4/7-5/21=[/tex]
[tex]=\frac{-4}{7} -5/21[/tex]
[tex]=\frac{-4}7} -\frac{5}{21}[/tex]
[tex]=-\frac{17}{21}[/tex]
salu2!!
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