[tex] \frac{c}{b} + \frac{7c}{11b} = \frac{11c + 7c}{11b} = \frac{18c}{11b} [/tex]
ответ: 18с/11б
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[tex] \frac{c}{b} + \frac{7c}{11b} = \frac{11c + 7c}{11b} = \frac{18c}{11b} [/tex]
ответ: 18с/11б