Question

Dois inteiros e sete oitavos mais sete nonos ?

Answer 1

Resposta:

$2\frac{7}{8} +\frac{7}{9} =x\\\\\frac{2\cdot8+7}{8} +\frac{7}{9} =x\\\\\frac{16+7}{8} +\frac{7}{9} =x\\\\\frac{23}{8} +\frac{7}{9} =x\\\\mmc = 8\cdot9 = 72\\23\cdot9+7 \cdot8 = 72x\\207+56=72x\\263=72x\\x = 263/72$

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