Respuesta :

Ckaranja
[tex] \frac{4}{7} + \frac{12}{21} [/tex]
LCM is 21
[tex] \frac{12+12}{21} [/tex]
=[tex] \frac{24}{21} [/tex]
On simplifying;
=[tex] \frac{8}{7} [/tex]
=1[tex] \frac{1}{7} [/tex]

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