Explicación paso a paso:
[tex] \frac{ - 1}{5} xy - \frac{4}{3} xy = \frac{ - 3xy - 20xy}{15} = \frac{ - 23xy}{15} [/tex]
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Explicación paso a paso:
[tex] \frac{ - 1}{5} xy - \frac{4}{3} xy = \frac{ - 3xy - 20xy}{15} = \frac{ - 23xy}{15} [/tex]