Question

чо писать 12412и412ии4и421и22414124412

Answer 1

$\frac{s + t}{t} \\ s = 10 \: \: \: \: \: \: t = - 5 \\ \frac{10 + ( - 5)}{ - 5} = \frac{10 - 5}{ - 5} = \frac{5}{ - 5} = - 1$