Question

Решите пж номер 2,3,4,5

Answer 1

4)

$\frac{a(x - y) + 3(x - y)}{(a - 3)(a + 3)} = \frac{(x - y)(3 + a)}{(a - 3)(a + 3)} = \frac{x - y}{a - 3}$

x=5,8 y=3,4 a=3,1

$\frac{x - y}{a - 3} = \frac{5.8 - 3.4}{3.1 - 3} = \frac{2.4}{0.1} = 24$

ответ:24