Question

Для каждого значения a решите уравнение:
(a − 1)x = 2
(a − 2)x = a − 2
(a + 3)x = a^2 + 6a + 9
(a^2 − 16)x = a + 4

Answer 1

$1) x = \frac{2}{a - 1} \\ 2) x = \frac{a - 2}{a - 2} \: \: \: \: x = 1$
$3)x = \frac{ {a}^{2} + 6a + 9}{a + 3} \\ x = \frac{ {(a + 3)}^{2} }{a + 3} = a + 3$
$4) x = \frac{a + 4}{(a + 4)(a - 4)} = \frac{1}{a - 4}$