Question

Rezultatul calculului $(\frac{1}{3} - \frac{1}{4} ): \frac{7}{12} - \frac{2 ^{3} }{7}$ este...

Answer 1

[1/3-1/4]·12/7-8/7
⇒[4/12-3/12]·12/7-8/7
⇒1/12·12/7-8/7
⇒1/7-8/7
⇒-7/7=-1;