Question

pensei num sétimo somei a dois quintos e subtrai de quatro sextos. qual número pensei?

Answer 1

1/7 + 2/5 - 4/6 =
1/7 + 2/5 - 2/3 =
m m c (7, 5 e 3) = 105

(105:7.1)/105 + (105:5.2)/105 - (105:3.2)/105 =
15/105 + 42/105 - 70/105 =
127/105