Question

1.$\frac{ay}{a-yb} +\frac{3a-by}{by-a}$Упростите выражение . Срочно !!!

Answer 1

$\frac{ay}{a - yb} + \frac{3a - by}{by - a} = \frac{ay}{a - by} - \frac{3a - by}{a - by} = \frac{ay - (3a - by)}{a - by} = \frac{ay - 3a + by}{a - by}$